Biggest changeThe following table sets forth, for the years indicated, certain Consolidated Statements of Income information (in millions, except percentages): Years Ended December 31, 2022 % of total Revenue 2021 % of total Revenue 2020 % of total Revenue Revenue: Product $ 5,198.0 84 % $ 4,793.9 84 % $ 3,634.6 83 % Service 1,024.2 16 % 916.2 16 % 723.8 17 % Total revenue 6,222.2 100 % 5,710.1 100 % 4,358.4 100 % Cost of revenue: Product 1,700.3 28 % 1,464.1 26 % 1,230.3 28 % Service 325.9 5 % 287.5 5 % 266.9 6 % Total cost of revenue 2,026.2 33 % 1,751.6 31 % 1,497.2 34 % Product gross profit 3,497.7 56 % 3,329.8 58 % 2,404.3 55 % Service gross profit 698.3 11 % 628.7 11 % 456.9 11 % Gross profit 4,196.0 67 % 3,958.5 69 % 2,861.2 66 % Operating expenses: Selling, general and administrative 1,739.9 28 % 1,466.5 25 % 1,216.3 28 % Research and development 879.0 14 % 671.0 12 % 595.1 14 % Total operating expenses 2,618.9 42 % 2,137.5 37 % 1,811.4 42 % Income from operations 1,577.1 25 % 1,821.0 32 % 1,049.8 24 % Interest and other income, net 29.7 1 % 69.3 1 % 157.2 4 % Income before taxes 1,606.8 26 % 1,890.3 33 % 1,207.0 28 % Income tax expense 262.4 4 % 162.2 3 % 140.2 3 % Net income 1,344.4 22 % 1,728.1 30 % 1,066.8 24 % Less: net income attributable to noncontrolling interest in joint venture 22.1 1 % 23.5 — % 6.2 — % Net income attributable to Intuitive Surgical, Inc. $ 1,322.3 21 % $ 1,704.6 30 % $ 1,060.6 24 % Total Revenue Total revenue increased by 9% to $6.2 billion for the year ended December 31, 2022, compared to $5.7 billion for the year ended December 31, 2021.
Biggest changeThe following table sets forth, for the years indicated, certain Consolidated Statements of Income information (in millions, except percentages): Years Ended December 31, 2023 % of total Revenue 2022 % of total Revenue 2021 % of total Revenue Revenue: Product $ 5,956.3 84 % $ 5,198.0 84 % $ 4,793.9 84 % Service 1,167.8 16 % 1,024.2 16 % 916.2 16 % Total revenue 7,124.1 100 % 6,222.2 100 % 5,710.1 100 % Cost of revenue: Product 2,041.8 29 % 1,700.3 28 % 1,464.1 26 % Service 352.8 5 % 325.9 5 % 287.5 5 % Total cost of revenue 2,394.6 34 % 2,026.2 33 % 1,751.6 31 % Product gross profit 3,914.5 55 % 3,497.7 56 % 3,329.8 58 % Service gross profit 815.0 11 % 698.3 11 % 628.7 11 % Gross profit 4,729.5 66 % 4,196.0 67 % 3,958.5 69 % Operating expenses: Selling, general and administrative 1,963.9 27 % 1,739.9 28 % 1,466.5 25 % Research and development 998.8 14 % 879.0 14 % 671.0 12 % Total operating expenses 2,962.7 41 % 2,618.9 42 % 2,137.5 37 % Income from operations 1,766.8 25 % 1,577.1 25 % 1,821.0 32 % Interest and other income, net 192.1 3 % 29.7 1 % 69.3 1 % Income before taxes 1,958.9 28 % 1,606.8 26 % 1,890.3 33 % Income tax expense 141.6 2 % 262.4 4 % 162.2 3 % Net income 1,817.3 26 % 1,344.4 22 % 1,728.1 30 % Less: net income attributable to noncontrolling interest in joint venture 19.3 1 % 22.1 1 % 23.5 — % Net income attributable to Intuitive Surgical, Inc. $ 1,798.0 25 % $ 1,322.3 21 % $ 1,704.6 30 % Total Revenue Total revenue increased by 14% to $7.1 billion for the year ended December 31, 2023, compared to $6.2 billion for the year ended December 31, 2022.
Certain of our unrecognized tax benefits could change due to activities of various tax authorities, including evolving interpretations of existing tax laws in the jurisdictions we operate, potential assessment of additional tax, possible settlement of audits, or through normal expiration of various statutes of limitations, which could affect our effective tax rate in the period in which they change.
Certain of our unrecognized tax benefits could change due to activities of various tax authorities, including evolving interpretations of existing tax laws in the jurisdictions in which we operate, potential assessment of additional tax, possible settlement of audits, or through normal expiration of various statutes of limitations, which could affect our effective tax rate in the period in which they change.
Financing Activities Net cash used in financing activities for the year ended December 31, 2022, consisted primarily of cash used in the repurchase of approximately 11.2 million shares of our common stock for $2.61 billion, 8.5 million shares of which related to accelerated share buyback programs executed and settled during 2022 and further described in Note 9 to the Consolidated Financial Statements, and taxes paid on behalf of employees related to net share settlements of vested employee equity awards of $194 million, partially offset by proceeds from stock option exercises and employee stock purchases of $234 million.
Net cash used in financing activities for the year ended December 31, 2022, consisted primarily of cash used in the repurchase of approximately 11.2 million shares of our common stock for $2.61 billion, 8.5 million shares of which related to accelerated share buyback programs executed and settled during 2022 and further described in Note 9 to the Consolidated Financial Statements, and taxes paid on behalf of employees related to net share settlements of vested employee equity awards of $194 million, partially offset by proceeds from stock option exercises and employee stock purchases of $234 million.
Many of the above factors will also impact future demand for our Ion system, as we extend our commercial offering into diagnostics, along with additional factors associated with a new product introduction, including, but not limited to, our ability to optimize manufacturing and our supply chain, competition, clinical data to demonstrate value, and market acceptance.
Many of the above factors will also impact future demand for our Ion endoluminal system, as we extend our commercial offering into diagnostics, along with additional factors associated with a new product introduction, including, but not limited to, our ability to optimize manufacturing and our supply chain, competition, clinical data to demonstrate value, and market acceptance.
The adoption of robotic-assisted surgery using the da Vinci Surgical System has the potential to grow for those procedures that offer greater patient value than to non-da Vinci alternatives and competitive total economics for healthcare providers. Our da Vinci Surgical Systems are used primarily in general surgery, urologic surgery, gynecologic surgery, cardiothoracic surgery, and head and neck surgery.
Da Vinci Procedures The adoption of robotic-assisted surgery using the da Vinci surgical system has the potential to grow for those procedures that offer greater patient value than to non-da Vinci alternatives and competitive total economics for healthcare providers. Our da Vinci surgical systems are used primarily in general, urologic, gynecologic, cardiothoracic, and head and neck surgeries.
Examples of such standards include electrical safety standards, such as those of the International Electrotechnical Commission, and composition standards, such as the Reduction of Hazardous Substances and the Waste Electrical and Electronic Equipment Directives. Failure to meet these standards could limit our ability to market our products in those regions that require compliance with such standards.
Examples of such standards include electrical safety standards, such as those of the International Electrotechnical Commission, and composition standards, such as the Reduction of Hazardous Substances and the Waste Electrical and Electronic Equipment Directives in the EU. Failure to meet these standards could limit our ability to market our products in those regions that require compliance with such standards.
The number and type of procedures are not intended to be considered in isolation or as a substitute for, or superior to, revenue or other financial information prepared and presented in accordance with GAAP. Worldwide Procedures Our systems and instruments are regulated independently in various countries and regions of the world.
The number and type of procedures are not intended to be considered in isolation or as a substitute for, or superior to, revenue or other financial information prepared and presented in accordance with GAAP. Our systems and instruments are regulated independently in various countries and regions of the world.
Intuitive System Leasing Since 2013, we have entered into sales-type and operating lease arrangements directly with certain qualified customers as a way to offer customers flexibility in how they acquire systems and expand their robotic-assisted programs while leveraging our balance sheet. These leases generally have commercially competitive terms as compared to other third-party entities that offer equipment leasing.
Intuitive System Leasing Since 2013, we have entered into sales-type and fixed-payment operating lease arrangements directly with certain qualified customers as a way to offer customers flexibility in how they acquire systems and expand their robotic-assisted programs while leveraging our balance sheet. These leases generally have commercially competitive terms as compared to other third-party entities that offer equipment leasing.
Our most critical accounting estimates include: • the valuation and recognition of investments, which impacts our investment portfolio balance when we assess fair value and interest and other income, net, when we record impairments; • the standalone selling prices used to allocate the contract consideration to the individual performance obligations, which impacts revenue recognition; • the valuation of inventory, which impacts gross profit margins; • the valuation of and assessment of the recoverability of intangible assets and goodwill and the estimated useful lives of intangible assets, which primarily impacts gross profit margin or operating expenses when we record asset impairments or accelerate their amortization; • the recognition and measurement of current and deferred income taxes (including the measurement of uncertain tax positions), which impact our provision for taxes; and • the estimate of probable loss associated with legal contingencies, which impacts accrued liabilities and operating expenses.
Our most critical accounting estimates include: • the valuation and recognition of investments, which impacts our investment portfolio balance when we assess fair value and interest and other income, net, when we record impairments; • the standalone selling prices used to allocate the contract consideration to the individual performance obligations, which impacts revenue recognition; • the valuation of inventory, which impacts gross profit margins; • the valuation of and assessment of the recoverability of intangible assets and goodwill and the estimated useful lives of intangible assets, which primarily impacts gross profit margin or operating expenses when we record asset impairments or accelerate their amortization; 83 Table of Contents • the recognition and measurement of current and deferred income taxes (including the measurement of uncertain tax positions), which impact our provision for taxes; and • the estimate of probable loss associated with legal contingencies, which impacts accrued liabilities and operating expenses.
In this equation, procedure efficacy is defined as a measure of the success of the surgery in resolving the underlying disease, and invasiveness is defined as a measure of patient pain and disruption of regular activities.
In this equation, procedure efficacy is defined as a measure of the success of the procedure in resolving the underlying disease, and invasiveness is defined as a measure of patient pain and disruption of regular activities.
We have also entered into usage-based arrangements with qualified customers that have committed da Vinci programs where we charge for the system and service as the systems are utilized. We believe that these alternative financing structures have been effective and well-received, and we are willing to expand the proportion of these structures based on customer demand.
We have also entered into usage-based operating lease arrangements with qualified customers that have committed da Vinci programs where we charge for the system and service as the systems are utilized. We believe that these alternative financing structures have been effective and well-received, and we are willing to expand the proportion of these structures based on customer demand.
Additionally, hospitals are facing significant financial pressure as supply chain constraints and inflation drive up operating costs, rising interest rates make access to credit more expensive, unrealized losses decrease available cash reserves, and fiscal stimulus programs enacted during the COVID-19 pandemic wind down.
Additionally, hospitals are facing significant financial pressure as supply chain constraints and inflation drive up operating costs, higher interest rates make access to credit more expensive, unrealized losses decrease available cash reserves, and fiscal stimulus programs enacted during the COVID-19 pandemic wind down.
Discussions of 2020 items and year-to-year comparisons between 2021 and 2020 that are not included in this report on Form 10-K can be found in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2021.
Discussions of 2021 items and year-to-year comparisons between 2022 and 2021 that are not included in this report on Form 10-K can be found in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.
Adoption of da Vinci for colorectal procedures, which includes several underlying procedures, including low anterior resections for rectal cancers and certain colon procedures for benign and cancerous conditions, has been ongoing for several years and is supported by certain technologies, such as the EndoWrist and SureForm Staplers, energy devices, and Integrated Table Motion. OUS Procedures.
The adoption of da Vinci for colorectal procedures, which includes several underlying procedures, such as low anterior resections for rectal cancers and certain colon procedures for benign and cancerous conditions, has been ongoing for several years and is supported by certain technologies, such as the EndoWrist and SureForm Staplers, energy devices, and Integrated Table Motion.
Business Model Overview We generate revenue from the placement of da Vinci Surgical Systems, in sales or sales-type lease arrangements where revenue is recognized up-front or in operating lease and usage-based arrangements where revenue is recognized over time. We earn recurring revenue from the sales of instruments, accessories, and services, as well as the revenue from operating leases.
Business Model Overview We generate revenue from the placement of da Vinci surgical systems, in sales or sales-type lease arrangements where revenue is recognized up-front or in fixed-payment or usage-based operating lease arrangements where revenue is recognized over time. We earn recurring revenue from the sales of instruments, accessories, and services, as well as revenue from operating leases.
When we determine that the useful lives of assets are shorter than we had originally estimated, we accelerate the rate of amortization over the assets’ new, shorter useful lives. No impairment charges or accelerated amortization were recorded for the years ended December 31, 2022, 2021, and 2020.
When we determine that the useful lives of assets are shorter than we had originally estimated, we accelerate the rate of amortization over the assets’ new, shorter useful lives. No impairment charges or accelerated amortization were recorded for the years ended December 31, 2023, 2022, and 2021.
Our products and operations are also subject to increasingly stringent medical device, privacy, and other regulations by regional, federal, state, and local authorities. After a device is placed on the market, numerous FDA and other regulatory requirements continue to apply.
Our products and operations are also subject to increasingly stringent medical device, privacy, and other regulations by regional, federal, state, and local authorities. After a device is placed on the market, numerous FDA and comparable foreign regulatory requirements continue to apply.
Moreover, usage-based arrangements generally contain no minimum payments; therefore, customers may exit such arrangements without paying a financial penalty to us. For some operating lease arrangements, our customers are provided with the right to purchase the leased system at certain points during and/or at the end of the lease term.
Moreover, usage-based operating lease arrangements generally contain no minimum payments; therefore, customers may exit such arrangements without paying a financial penalty to us. 66 Table of Contents For some operating lease arrangements, our customers are provided with the right to purchase the leased system at certain points during and/or at the end of the lease term.
Financial Statements and Supplementary Data” for additional information regarding recent accounting pronouncements, including the respective expected dates of adoption and estimated effects, if any, on our Consolidated Financial Statements. 81 Table of Contents
Financial Statements and Supplementary Data” for additional information regarding recent accounting pronouncements, including the respective expected dates of adoption and estimated effects, if any, on our Consolidated Financial Statements. 86 Table of Contents
Based on our business model, we anticipate that we will continue to be able to fund future growth through cash provided by our operations. We believe that our current cash, cash equivalents, and investment balances, together with income to be derived from the sale of our products, will be sufficient to meet our liquidity requirements for the foreseeable future.
Based on our business model, we anticipate that we will continue to be able to fund future growth through cash provided by our operations. We believe that our current cash, cash equivalents, and investment balances, together with income to be derived from our business, will be sufficient to meet our liquidity requirements for the foreseeable future.
Colorectal procedures contributed the most incremental procedures in 2022, 2021, and 2020, aided by improved clinical outcomes relative to open and laparoscopic techniques within certain patient populations, along with enabling technologies, such as EndoWrist and SureForm staplers, energy devices, and Integrated Table Motion. System Demand We placed 1,264 da Vinci Surgical Systems in 2022, compared to 1,347 systems in 2021.
Colorectal procedures contributed the most incremental procedures in 2023, 2022, and 2021, aided by improved clinical outcomes relative to open and laparoscopic techniques within certain patient populations, along with enabling technologies, such as EndoWrist and SureForm staplers, energy devices, and Integrated Table Motion. System Demand We placed 1,370 da Vinci surgical systems in 2023, compared to 1,264 systems in 2022.
Any or all of these factors could negatively impact the number of da Vinci procedures performed or the number of system placements and have a material adverse effect on our business, financial condition, or results of operations resulting in failure to achieve our anticipated financial results.
Any or all of these factors could negatively impact the number of da 63 Table of Contents Vinci procedures performed or the number of system placements and have a material adverse effect on our business, financial condition, or results of operations resulting in the failure to achieve our anticipated financial results.
We generally earn between $600 and $3,500 of instruments and accessories revenue per surgical procedure performed, depending on the type and complexity of the specific procedures performed and the number and type of instruments used.
We generally earn between $700 and $3,600 of instruments and accessories revenue per surgical procedure performed, depending on the type and complexity of the specific procedures performed and the number and type of instruments used.
However, given the differences in surgical complexity associated with the treatment of various hernia patient populations and varying surgeon opinions regarding optimal surgical technique, it is difficult to estimate the timing of and to what extent hernia repair procedure volume will grow in the future.
However, given the differences in surgical complexity associated with the treatment of various hernia patient populations and varying surgeon opinions regarding 71 Table of Contents optimal surgical technique, it is difficult to estimate the timing of and to what extent hernia repair procedure volume will grow in the future.
Revenue denominated in foreign currencies as a percentage of total revenue was approximately 24%, 23%, and 23% for the years ended December 31, 2022, 2021, and 2020, respectively. We generally sell our products and services in local currencies where we have direct distribution channels.
Revenue denominated in foreign currencies as a percentage of total revenue was approximately 25%, 24%, and 23% for the years ended December 31, 2023, 2022, and 2021, respectively. We generally sell our products and services in local currencies where we have direct distribution channels.
These estimates and judgments occur in the calculation of tax credits, benefits, and deductions and in the calculation of certain tax assets and liabilities, which arise from differences in the timing of recognition of revenue and expense for tax and 80 Table of Contents financial statement purposes, as well as the interest and penalties related to uncertain tax positions.
These estimates and judgments occur in the calculation of tax credits, benefits, and deductions and in the calculation of certain tax assets and liabilities, which arise from differences in the timing of recognition of revenue and expense for tax and financial statement purposes, as well as the interest and penalties related to uncertain tax positions.
We believe that growth in these global markets is being driven by increased acceptance among surgeons and health systems, supported by expanded global evidence validating the clinical and economic value of da Vinci procedures as well as increased surgeon training. OUS Urology. Along with general surgery, OUS urology procedures have been a strong contributor to our overall procedure growth.
We believe that growth in these global markets is being driven by increased acceptance among surgeons and health systems, supported by expanded global evidence validating the clinical and economic value of da Vinci procedures as well as increased surgeon training. OUS Urology. OUS urology procedures have been a strong contributor to our overall procedure growth.
Seasonality outside of the U.S. varies and is more pronounced around local holidays and vacation periods. As a result of the factors outlined in the COVID-19 Pandemic section above, including past and potentially future recommendations of authorities to defer elective procedures, historical procedure patterns may be disrupted.
Seasonality outside of the U.S. varies and is more pronounced around local holidays and vacation periods, which have lower procedure volume. As a result of the factors outlined in the COVID-19 Pandemic section above, including past and potentially future recommendations of authorities to defer elective procedures, historical procedure patterns may be disrupted.
Inventory, including the transfer of equipment from inventory to property, plant, and equipment, increased by $256 million, primarily to address the growth in the business as well as to mitigate risks of disruption that could arise from trade, supply, or other matters. Refer to further details in the supplemental cash flow information in Note 4 to the Consolidated Financial Statements.
Inventory, including the transfer of equipment from inventory to property, plant, and equipment, increased by $713 million, primarily to address the growth in the business as well as to mitigate risks of disruption that could arise from supply or other matters. Refer to the supplemental cash flow information in Note 4 to the Consolidated Financial Statements for further details.
An additional 12 da Vinci procedures were granted reimbursement effective April 1, 2018, including gastrectomy, low anterior resection, lobectomy, and hysterectomy, for both malignant and benign conditions, and an additional seven da Vinci procedures were granted reimbursement effective April 1, 2020. An additional eight da Vinci procedures were granted reimbursement effective April 1, 2022, including colon resection.
An additional 12 da Vinci procedures were granted reimbursement in April, 2018, including gastrectomy, low anterior resection, lobectomy, and hysterectomy, for both malignant and benign conditions, and an additional seven da Vinci procedures were granted reimbursement in April, 2020. An additional eight da Vinci procedures were granted reimbursement in April, 2022, including colon resection.
If a reasonable estimate of a known or probable loss cannot be made, but a range of probable losses can be estimated, the low-end of the range of losses is recognized if no amount within the range is a better estimate than any other.
If a reasonable estimate of a known or probable loss cannot be made, but a range of probable losses can be 85 Table of Contents estimated, the low-end of the range of losses is recognized if no amount within the range is a better estimate than any other.
All da Vinci systems include a surgeon’s console (or consoles), imaging electronics, a patient-side cart, and computational hardware and software. We are in the early stages of launching our da Vinci SP Surgical System, and we have an installed base of 121 da Vinci SP Surgical Systems as of December 31, 2022.
All da Vinci systems include a surgeon’s console (or consoles), imaging electronics, a patient-side cart, and computational hardware and software. We are in the early stages of launching our da Vinci SP surgical system, and we have an installed base of 177 da Vinci SP surgical systems as of December 31, 2023.
Clearances, Approvals, and Certifications We have generally obtained the regulatory clearances, approvals, and certifications required to market our products associated with our da Vinci Surgical Multiport Systems (Standard, S, Si, Xi, and X systems) for our targeted surgical specialties within the U.S., South Korea, Japan, and the European markets in which we operate.
Clearances, Approvals, and Certifications We have generally obtained the regulatory clearances, approvals, and certifications required to market our products associated with our da Vinci multi-port surgical systems (S, Si, Xi, and X systems) for our targeted surgical specialties within the U.S., South Korea, Japan, and the European markets in which we operate.
This section of the Annual Report on Form 10-K generally discusses 2022 and 2021 items and year-to-year comparisons between 2022 and 2021.
This section of the Annual Report on Form 10-K generally discusses 2023 and 2022 items and year-to-year comparisons between 2023 and 2022.
In the fourth quarter of 2021, we made a charitable contribution of $30 million to the Intuitive Foundation, a not-for-profit organization whose mission is to reduce the global burden of disease and suffering through research, education, and philanthropy aimed at better outcomes for patients around the globe.
In the fourth quarter of 2023, we made a charitable contribution of $40 million to the Intuitive Foundation, a not-for-profit organization whose mission is to reduce the global burden of disease and suffering through research, education, and philanthropy aimed at better outcomes for patients around the globe.
The da Vinci Surgical System generally sells for between $0.5 million and $2.5 million, depending upon the model, configuration, and geography, and represents a significant capital equipment investment for our customers when purchased.
The da Vinci surgical system generally sells for between $0.7 million and $2.5 million, depending on the model, configuration, and geography, and represents a significant capital equipment investment for our customers when purchased.
Due to the uncertainty related to the timing and potential outcome of audits, we cannot estimate the range of reasonably possible changes in unrecognized tax benefits that may occur in the next 12 months. We are subject to the examination of our income tax returns by the IRS and other tax authorities.
Due to the uncertainty related to the timing and potential outcome of audits, we cannot estimate the range of reasonably possible changes in unrecognized tax benefits that may occur in the next 12 months. We are subject to the examination of our income tax returns by the Internal Revenue Service and other tax authorities.
OUS urology procedures grew to approximately 316,000 in 2022, compared to approximately 264,000 in 2021 and approximately 215,000 in 2020. In the U.S., da Vinci is the standard of care for the surgical treatment of prostate cancer, and we believe that the growth is largely aligned with surgical volumes of prostate cancer.
OUS urology procedures grew to approximately 381,000 in 2023, compared to approximately 316,000 in 2022 and approximately 264,000 in 2021. In the U.S., da Vinci is the standard of care for the surgical treatment of prostate cancer, and we believe that the growth is largely aligned with surgical volumes of prostate cancer.
As of December 31, 2022, the companies have contributed $55 million of up to $100 million required by the joint venture agreement.
As of December 31, 2023, the companies have contributed $55 million of up to $100 million required by the joint venture agreement.
As revenue for operating leases and usage-based systems is recognized over time, total systems revenue growth is reduced in a period when the number of operating lease and usage-based placements increases as a proportion of total system placements. Generally, lease transactions generate similar gross margins as our sale transactions.
As revenue for fixed-payment and usage-based operating lease arrangements is recognized over time, total systems revenue growth is reduced in a period when the number of operating lease placements increases as a proportion of total system placements. Generally, lease transactions generate similar gross margins as our sale transactions.
Target procedures in urology include prostatectomy and partial nephrectomy. Target procedures in gynecology include hysterectomy for both cancer and benign conditions and sacrocolpopexy. In cardiothoracic surgery, target procedures include lobectomy. In head and neck surgery, target procedures include transoral surgery.
Target procedures in urology include prostatectomy and partial nephrectomy. Target procedures in gynecology include hysterectomy for both cancer and benign conditions and sacrocolpopexy. In cardiothoracic surgery, target procedures include lung resection. In head and neck surgery, target procedures include transoral surgery.
The increase in research and development expenses for the year ended December 31, 2022, was primarily driven by higher personnel-related expenses, including share-based compensation expense, project costs incurred to support a broader set of product development initiatives, including future generations of robotics, Ion and SP platform investments, and digital investments, and intangible asset-related charges.
The increase in research and development expenses for the year ended December 31, 2023, was primarily driven by higher personnel-related expenses, including share-based compensation expense, and other project costs incurred to support a broader set of product development initiatives, including future generations of robotics, Ion and SP platform investments, and digital investments.
Adoption of da Vinci procedures occurs procedure by procedure and market by market and is driven by the relative patient value and total treatment costs of da Vinci procedures as compared to alternative treatment options for the same disease state or condition.
Adoption of robotic-assisted procedures occurs by procedure and by market and is driven by the relative patient value and total treatment costs of robotic-assisted procedures as compared to alternative treatment options for the same disease state or condition.
Recent Product Introductions SureForm 30 Curved-Tip Stapler and Reloads. In December 2021, we obtained FDA clearance for our 8 mm SureForm 30 Curved-Tip Stapler and reloads (gray, white, and blue) for use in general, thoracic, gynecologic, urologic, and pediatric surgery.
In December 2021, we obtained initial FDA clearance for our 8 mm SureForm 30 Curved-Tip Stapler and reloads (gray, white, and blue) for use in general, thoracic, gynecologic, urologic, and pediatric surgery.
For instances in which the achievement of these milestones is neither probable nor reasonably estimable, such contingencies have not been recorded on our Consolidated Balance Sheets. 2017 Tax Act deemed repatriation tax. As of December 31, 2022, our obligation associated with the deemed repatriation tax is $161 million, of which $40 million is due within a year.
For instances in which the achievement of these milestones is neither probable nor reasonably estimable, such contingencies have not been recorded on our Consolidated Balance Sheets. 2017 Tax Act deemed repatriation tax. As of December 31, 2023, our obligation associated with the deemed repatriation tax is $121 million, of which $54 million is due within a year.
We lease spaces for our operations in the U.S. as well as in Japan, China, Israel, Mexico, Germany, South Korea, the United Kingdom, and other countries. We also lease automobiles for certain sales and field service employees. These leases have varying terms of up to 20 years.
Contractual Obligations and Commercial Commitments Operating leases. We lease spaces for our operations in the U.S. as well as in Japan, China, Israel, Mexico, Germany, South Korea, the United Kingdom, India, and other countries. We also lease automobiles for certain sales and field service employees. These leases have varying terms of up to 20 years.
Selling, general and administrative expenses for the years ended December 31, 2022, and 2021, included share-based compensation expense of $261 million and $232 million, respectively, and intangible assets amortization expense of $5.9 million and $7.3 million, respectively. Research and Development Expenses Research and development costs are expensed as incurred.
Selling, general and administrative expenses for the years ended December 31, 2023, and 2022, included share-based compensation expense of $275 million and $261 million, respectively, and intangible assets amortization expense of $3.3 million and $5.9 million, respectively. Research and Development Expenses Research and development costs are expensed as incurred.
However, we may experience reduced cash flow from operations as a result of the increasing risk of a recession along with other macroeconomic and geopolitical headwinds. As of December 31, 2022, $396 million of our cash, cash equivalents, and investments was held by foreign subsidiaries.
However, we may experience reduced cash flow from operations as a result of the risk of a recession along with other macroeconomic and geopolitical headwinds. As of December 31, 2023, $521 million of our cash, cash equivalents, and investments was held by foreign subsidiaries.
The non-cash charges outlined above were partially offset by changes in operating assets and liabilities that resulted in $368 million of cash used in operating activities during the year ended December 31, 2021.
The non-cash charges outlined above were partially offset by changes in operating assets and liabilities that resulted in $778 million of cash used in operating activities during the year ended December 31, 2023.
More than one third of our estimated purchase commitments and obligations are facilities-related. Although open purchase orders are considered enforceable and legally binding, the terms generally allow us the option to cancel, reschedule, or adjust our requirements based on our business needs prior to the delivery of goods or 78 Table of Contents performance of services.
Approximately one third of our estimated purchase commitments and obligations are facilities-related. Although open purchase orders are considered enforceable and legally binding, the terms generally allow us the option to cancel, reschedule, or adjust our requirements based on our business needs prior to the delivery of goods or performance of services.
The higher product gross profit for the year ended December 31, 2022, was primarily driven by higher product revenue, partially offset by lower product gross profit margin.
The higher product gross profit for the year ended December 31, 2023, was primarily driven by higher product revenue, partially offset by a lower product gross profit margin.
As of December 31, 2022, and 2021, net unrealized losses on investments of $154.2 million and $16.0 million, net of tax, respectively, were included in accumulated other comprehensive loss. Revenue recognition. Our system sale arrangements contain multiple products and services, including system(s), system components, system accessories, instruments, accessories, and services.
As of December 31, 2023, and 2022, net unrealized losses on investments of $29.7 million and $154.2 million, net of tax, respectively, were included in accumulated other comprehensive loss. Revenue recognition. Our system sale arrangements contain multiple products and services, including system(s), system components, system accessories, instruments, accessories, and services.
General surgery was our largest and fastest growing U.S. specialty in 2022 with procedure volume that grew to approximately 720,000 in 2022, compared to approximately 588,000 in 2021 and approximately 434,000 in 2020.
General surgery was our largest and fastest growing U.S. specialty in 2023 with procedure volume that grew to approximately 896,000 in 2023, compared to approximately 720,000 in 2022 and approximately 588,000 in 2021.
Management believes that the installed base, number of placements, and utilization of systems provide meaningful supplemental information regarding our performance, as management believes that the installed base, number of placements, and utilization of systems are an indicator of the rate of adoption of robotic-assisted surgery or bronchoscopy as well as an indicator of future recurring revenue.
Management believes that the installed base, number of placements, and utilization of systems provide meaningful supplemental information regarding our performance, as management believes that the installed base, number of placements, and utilization of systems are an indicator of the rate of adoption of our robotic-assisted medical procedures as well as an indicator of future recurring revenue.
Our da Vinci X Surgical System is targeted toward price-sensitive markets and procedures. Our da Vinci SP Surgical System complements the da Vinci Xi and X Surgical Systems by enabling surgeons to access narrow workspaces. Procedure Seasonality More than half of da Vinci procedures performed are for benign conditions, most notably hernia repairs, hysterectomies, and cholecystectomies.
Our da Vinci SP surgical system complements the da Vinci Xi and X surgical systems by enabling surgeons to access narrow workspaces. Procedure Seasonality More than half of the da Vinci procedures performed are for benign conditions, most notably hernia repairs, hysterectomies, and cholecystectomies.
These judgments could prove to be wrong, and companies with relatively high credit ratings and solid financial conditions may not be able to fulfill their obligations. 79 Table of Contents No significant impairment charges were recorded during the years ended December 31, 2022, 2021, and 2020.
These judgments could prove to be wrong, and companies with relatively high credit ratings and solid financial conditions may not be able to fulfill their obligations. No significant impairment charges were recorded during the years ended December 31, 2023, 2022, and 2021.
Gynecology was our second largest U.S. surgical specialty in 2022 with procedure volume that grew to approximately 341,000 in 2022, compared to approximately 316,000 in 2021 and approximately 267,000 in 2020.
Gynecology was our second largest U.S. surgical specialty in 2023 with procedure volume that grew to approximately 390,000 in 2023, compared to approximately 341,000 in 2022 and approximately 316,000 in 2021.
Urology was our third largest U.S. surgical specialty in 2022 with procedure volume that grew to approximately 162,000 in 2022, compared to approximately 153,000 in 2021 and approximately 134,000 in 2020.
Urology was our third largest U.S. surgical specialty in 2023 with procedure volume that grew to approximately 173,000 in 2023, compared to approximately 162,000 in 2022 and approximately 153,000 in 2021.
Foreign currency rate fluctuations, as determined by comparing current period revenue in USD to current period revenue in local currency using the same foreign exchange rates as the prior year same period, net of the impacts from foreign currency hedging, had an unfavorable impact on OUS total revenue of $138 million for the year 71 Table of Contents ended December 31, 2022, as compared to 2021.
Foreign currency rate fluctuations, as determined by comparing current period revenue in USD to current period revenue in local currency using the same foreign exchange rates as the prior year same period, net of the impacts from foreign currency hedging, had an unfavorable impact on OUS total revenue of $29 million for the year ended December 31, 2023, as compared to 2022.
U.S. da Vinci Procedures Overall U.S. procedure volume with da Vinci Surgical Systems grew to approximately 1,282,000 in 2022, compared to approximately 1,109,000 in 2021 and approximately 876,000 in 2020.
U.S. da Vinci Procedures Overall U.S. procedure volume with da Vinci surgical systems grew to approximately 1,532,000 in 2023, compared to approximately 1,282,000 in 2022 and approximately 1,109,000 in 2021.
Management believes that the number and type of procedures provide meaningful supplemental information regarding our performance, as management believes procedure volume is an indicator of the rate of adoption of robotic-assisted surgery or bronchoscopy as well as an indicator of future revenue (including revenue from usage-based arrangements).
Management believes that the number and type of procedures provide meaningful supplemental information regarding our performance, as management believes procedure volume is an indicator of the rate of adoption of our robotic-assisted medical procedures as well as an indicator of future revenue (including revenue from usage-based operating lease arrangements).
For OUS, prostatectomy is at varying states of adoption in different areas of the world but is the largest overall da Vinci procedure. In 2022, we saw more moderate growth in OUS prostatectomy procedures compared to higher growth in 2021, as we are further up the adoption curve.
Outside of the U.S., prostatectomy is at varying states of adoption in different areas of the world but is the largest overall da Vinci procedure. In 2023, we saw more moderate growth in OUS prostatectomy procedures compared to higher growth in 2022, as we are further up the adoption curve.
In geographies where da Vinci procedure adoption is in an early stage or system placements are constrained by regulation, system sales will precede procedure growth. System placements also vary due to seasonality largely aligned with hospital budgeting cycles.
Systems Revenue System placements are driven by procedure growth in most markets. In some markets, system placements are constrained by regulation. In geographies where da Vinci procedure adoption is in an early stage or system placements are constrained by regulation, system sales will precede procedure growth. System placements also vary due to seasonality largely aligned with hospital budgeting cycles.
These requirements include establishment registration and device listing with the FDA and compliance with medical device reporting regulations, which require that manufacturers report to the FDA if their device caused or contributed, or may have caused or contributed, to a death or serious injury or malfunctioned in a way that would likely cause or contribute to a death or serious injury if it were to recur.
These requirements include establishment registration and device listing with the 67 Table of Contents FDA or other foreign regulatory authorities and compliance with medical device reporting regulations, which require that manufacturers report to the FDA or other foreign regulatory authorities if their device caused or contributed, or may have caused or contributed, to a death or serious injury or malfunctioned in a way that would likely cause or contribute to a death or serious injury if it were to recur.
Total da Vinci procedures performed by our customers grew approximately 18% for the year ended December 31, 2022, compared to approximately 28% for the year ended December 31, 2021.
Total da Vinci procedures performed by our customers grew approximately 22% for the year ended December 31, 2023, compared to approximately 18% for the year ended December 31, 2022.
The decrease in interest and other income, net, for the year ended December 31, 2022, was primarily driven by unrealized losses on investments resulting from strategic arrangements (compared to unrealized gains on investments resulting from strategic arrangements in 2021) and higher foreign exchange losses, partially offset by higher interest income earned, despite lower cash and investment balances, due to an increase in average interest rates.
The increase in interest and other income, net, for the year ended December 31, 2023, was primarily driven by higher interest income earned due to an increase in average interest rates (despite lower average cash and investment balances), lower foreign exchange losses, and lower unrealized losses on investments resulting from strategic arrangements.
U.S. da Vinci procedures grew approximately 16% for the year ended December 31, 2022, compared to approximately 27% for the year ended December 31, 2021. The 2022 and 2021 procedure results (and comparative 2020 procedures results) reflected disruption caused by the COVID-19 pandemic, as noted in the COVID-19 Pandemic section above, which significantly impacted our procedures.
U.S. da Vinci procedures grew approximately 19% for the year ended December 31, 2023, compared to approximately 16% for the year ended December 31, 2022. The 2022 procedure results (and comparative 2021 procedures results) reflected disruption caused by the COVID-19 pandemic, as noted in the COVID-19 Pandemic section above.
OUS da Vinci Procedures Overall OUS procedure volume with da Vinci Surgical Systems grew to approximately 593,000 in 2022, compared to approximately 485,000 in 2021 and approximately 367,000 in 2020. Urology was our largest OUS specialty in 2022 with procedure volume that grew to approximately 316,000 in 2022, compared to approximately 264,000 in 2021 and approximately 215,000 in 2020.
OUS da Vinci Procedures Overall OUS procedure volume with da Vinci surgical systems grew to approximately 754,000 in 2023, compared to approximately 593,000 in 2022 and approximately 485,000 in 2021. Urology was our largest OUS specialty in 2023 with procedure volume that grew to approximately 381,000 in 2023, compared to approximately 316,000 in 2022 and approximately 264,000 in 2021.
Distribution Channels We provide our products through direct sales organizations in the U.S., Europe (excluding Spain, Portugal, Italy, Greece, and most Eastern European countries), China (through our Intuitive-Fosun Pharma joint venture), Japan, South Korea, India, Taiwan and, as of June 2022, Canada.
Distribution Channels We provide our products through direct sales organizations in the U.S., Europe (excluding Italy, Spain, Portugal, Greece, and Eastern European countries), China (through our Intuitive-Fosun Pharma Joint Venture), Japan, South Korea, India, Taiwan, and Canada. In the remainder of our OUS markets, we provide our products through distributors.
We invest predominantly in high quality, fixed income securities. Our investment portfolio may, at any time, contain investments in U.S. treasury and U.S. government agency securities, taxable and tax-exempt municipal notes, corporate notes and bonds, commercial paper, non-U.S. government agency securities, cash deposits, and money market funds.
Our investment portfolio may, at any time, contain investments in U.S. treasury and U.S. government agency securities, taxable and tax-exempt municipal notes, corporate notes and bonds, commercial paper, non-U.S. government agency securities, cash deposits, and money market funds.
The lower 2022 ASP was largely driven by unfavorable foreign currency impacts, unfavorable geographic mix, and higher pricing discounts, partially offset by favorable product mix and fewer trade-ins. ASP fluctuates from period to period based on geographic and product mix, product pricing, systems placed involving trade-ins, and changes in foreign exchange rates.
The lower ASP for the year ended December 31, 2023, was largely driven by higher pricing discounts, unfavorable product mix, unfavorable geographic mix, and foreign currency impacts, partially offset by fewer trade-ins. ASP fluctuates from period to period based on geographic and product mix, product pricing, systems placed involving trade-ins, and changes in foreign exchange rates.
As of December 31, 2022, we believe that it is more likely than not that our deferred tax assets will ultimately be recovered, with the exception of our California deferred tax assets.
As of December 31, 2023, we believe that it is more likely than not that our deferred tax assets will ultimately be recovered, with the exception of our California deferred tax assets and a portion of our Swiss deferred tax assets.
Our provision for income taxes for 2022 and 2021 included excess tax benefits associated with employee equity plans of $99 million and $186 million, respectively, which reduced our effective tax rate by 6.1 and 9.8 percentage points, respectively.
Our provision for income taxes for 2023 and 2022 included excess tax benefits associated with employee equity plans of $108 million and $99 million, respectively, which reduced our effective tax rate by 5.5 and 6.1 percentage points, respectively.
Net cash used in investing activities for the year ended December 31, 2021, consisted primarily of purchases of investments, net of proceeds from maturities and sales, of $2.10 billion and $340 million paid for the acquisition of property, plant, and equipment.
Net cash used in investing activities for the year ended December 31, 2021, consisted primarily of purchases of investments, net of proceeds from maturities and sales, of $2.10 billion and $340 million paid for the acquisition of property, plant, and equipment. We invest predominantly in high quality, fixed income securities.
In the fourth quarter of 2022, we saw a resurgence in COVID-19 cases in China, which had a significant negative impact on our procedure volumes in the region.
In the fourth quarter of 2022, we saw a resurgence in COVID-19 cases in China, which had a significant negative impact on our procedure volumes in the region. In 2023, COVID-19 resurgences in China continued to negatively impact our procedure volumes in January.
Refer to the descriptions of our new products that received regulatory clearances, approvals, or certifications in 2022, 2021, and 2020 in the Recent Product Introductions section below. In October 2018, the China National Health Commission published on its official website the quota for major medical equipment to be sold in China through 2020.
Refer to the descriptions of our new products that received regulatory clearances, approvals, or certifications in 2023, 2022, and 2021 in the Recent Product Introductions section below. In June 2023, the China National Health Commission published the 14th five-year plan quota for major medical equipment to be sold in China on its official website.
In 2022, approximately 1,875,000 surgical procedures were performed with da Vinci Surgical Systems, compared to approximately 1,594,000 and 1,243,000 surgical procedures performed with da Vinci Surgical Systems in 2021 and 2020, respectively.
In 2023, approximately 2,286,000 surgical procedures were performed with da Vinci surgical systems, compared to approximately 1,875,000 and 1,594,000 surgical procedures performed with da Vinci surgical systems in 2022 and 2021, respectively.
OUS general surgery procedures grew to approximately 133,000 in 2022, compared to approximately 101,000 in 2021 and approximately 68,000 in 2020.
OUS general surgery procedures grew to approximately 188,000 in 2023, compared to approximately 133,000 in 2022 and approximately 101,000 in 2021.
Research and development expenses for the years ended December 31, 2022, and 2021, included share-based compensation expense of $164 million and $134 million, respectively, and intangible asset-related charges of $20.3 million and $11.1 million, respectively. Research and development expenses fluctuate with project timing.
Research and development expenses for the years ended December 31, 2023, and 2022, included share-based compensation expense of $212 million and $164 million, respectively, and intangible asset-related charges of $13.5 million and $20.3 million, respectively. Research and development expenses fluctuate with project timing.
When the patient value of a da Vinci procedure is greater than that of alternative treatment options, patients may benefit from seeking out surgeons and hospitals that offer da Vinci Surgery, which could potentially result in a local market share shift.
When the patient value of a robotic-assisted procedure is greater than that of alternative treatment options, patients may benefit from seeking out surgeons or physicians and hospitals that offer robotic-assisted medical procedures, which could potentially result in a local market share shift.