Organization and Basis of Presentation	6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation The Company Tandem Diabetes Care, Inc. is a global insulin delivery and diabetes technology company focused on the design, development, and commercialization of technology solutions that reduce the burden of diabetes management. Tandem Diabetes Care, Inc. is incorporated in the state of Delaware. Unless the context requires otherwise, the terms the “Company” or “Tandem” refer to Tandem Diabetes Care, Inc., together with its wholly-owned subsidiaries. The Company’s strategy is to offer flexibility and choice in intelligent insulin delivery systems through an accessible portfolio of market-leading pumps, applications and insights. In support of this strategy, the Company’s pump platforms include t:slim X2 and Tandem Mobi (Mobi). Both pumps feature Control-IQ+ technology, which is the Company’s most advanced algorithm for managing insulin delivery, using information received from compatible continuous glucose monitoring (CGM) sensors. New software for the insulin pumps may be updated remotely by the individual users as new advancements become available. The insulin pumps are compatible with other complementary digital health offerings, such as the Company’s mobile application and cloud-based diabetes management applications. The Company’s insulin pumps are durable medical devices designed for multiple years of daily use. In addition, the Company sells disposable supplies used in conjunction with the pumps, which are replaced periodically. These supplies include cartridges for storing insulin, and infusion sets that contain a cannula and connect the pump to a user’s body to administer insulin. Basis of Presentation and Principles of Consolidation The Company has prepared the accompanying unaudited condensed consolidated financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and pursuant to the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, the accompanying condensed consolidated financial statements include all adjustments, consisting only of normal and recurring adjustments, necessary for a fair presentation. Interim financial results are not necessarily indicative of results anticipated for the full year or any other period(s). These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 (Annual Report), from which the condensed consolidated balance sheet presented as of December 31, 2025 herein was derived. The condensed consolidated financial statements include the accounts of Tandem Diabetes Care, Inc. and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. The functional currency of each of the Company’s foreign subsidiaries is its respective local currency. The Company translates the financial statements of its foreign subsidiaries into U.S. dollars using period-end exchange rates for assets and liabilities and average exchange rates for each period for revenue, costs and expenses. Translation-related adjustments are included in other comprehensive income (loss) in the condensed consolidated statements of operations, and in accumulated other comprehensive income (loss) in the stockholders’ equity section of the Company’s condensed consolidated balance sheets. Foreign exchange gains or losses resulting from balances denominated in a currency other than the functional currency are recognized in interest income and other income, net in the Company’s condensed consolidated statements of operations.

Tandem Diabetes Care, Inc. is a global insulin delivery and diabetes technology company focused on the design, development, and commercialization of technology solutions that reduce the burden of diabetes management. Tandem Diabetes Care, Inc. is incorporated in the state of Delaware. Unless the context requires otherwise, the terms the “Company” or “Tandem” refer to Tandem Diabetes Care, Inc., together with its wholly-owned subsidiaries.

The Company’s strategy is to offer flexibility and choice in intelligent insulin delivery systems through an accessible portfolio of market-leading pumps, applications and insights. In support of this strategy, the Company’s pump platforms include t:slim X2 and Tandem Mobi (Mobi). Both pumps feature Control-IQ+ technology, which is the Company’s most advanced algorithm for managing insulin delivery, using information received from compatible continuous glucose monitoring (CGM) sensors. New software for the insulin pumps may be updated remotely by the individual users as new advancements become available. The insulin pumps are compatible with other complementary digital health offerings, such as the Company’s mobile application and cloud-based diabetes management applications. The Company’s insulin pumps are durable medical devices designed for multiple years of daily use. In addition, the Company sells disposable supplies used in conjunction with the pumps, which are replaced periodically. These supplies include cartridges for storing insulin, and infusion sets that contain a cannula and connect the pump to a user’s body to administer insulin.

The Company has prepared the accompanying unaudited condensed consolidated financial statements in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and pursuant to the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, the accompanying condensed consolidated financial statements include all adjustments, consisting only of normal and recurring adjustments, necessary for a fair presentation.

Interim financial results are not necessarily indicative of results anticipated for the full year or any other period(s). These unaudited condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025 (Annual Report), from which the condensed consolidated balance sheet presented as of December 31, 2025 herein was derived. The condensed consolidated financial statements include the accounts of Tandem Diabetes Care, Inc. and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

The functional currency of each of the Company’s foreign subsidiaries is its respective local currency. The Company translates the financial statements of its foreign subsidiaries into U.S. dollars using period-end exchange rates for assets and liabilities and average exchange rates for each period for revenue, costs and expenses. Translation-related adjustments are included in other comprehensive income (loss) in the condensed consolidated statements of operations, and in accumulated other comprehensive income (loss) in the stockholders’ equity section of the Company’s condensed consolidated balance sheets. Foreign exchange gains or losses resulting from balances denominated in a currency other than the functional currency are recognized in interest income and other income, net in the Company’s condensed consolidated statements of operations.