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Description of the Business	3 Months Ended
Description of the Business	Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business	Description of the Business Overview of the Business The Oncology Institute, Inc. (“TOI”), originally founded in 2007, is a leading, national platform delivering integrated direct care and cost management to patients and payors who are experiencing or managing members undergoing treatment for cancer and other complex medical conditions. Through wholly-owned subsidiaries and affiliated entities, TOI operates combined community clinics and infusion suites staffed with providers who administer latest-generation cancer treatments including chemotherapy, immunotherapy, oncolytics, and radiation oncology. Additionally, TOI provides coordinated case management, drug formulary management, and fully-delegated networks of care providers, all of which we use to drive improved treatment outcomes at the lowest possible cost to our patients and payors. Additionally, TOI operates a specialty pharmacy that includes both in-office and mail-order dispensing for complementary oral and self-injectable medications taken by our patients concurrent with their in-office cancer therapies. Given the scale, breadth, and depth of our oncological expertise, TOI also contributes significantly to clinical research in the fields of oncology, hematology, and supportive medications and devices. The Company has 121 oncologists and mid-level professionals across 67 clinic locations located within five states: California, Florida, Arizona, Oregon and Nevada. The Company has contractual relationships with multiple payors, serving Medicare, including Medicare Advantage, Medi-Cal, and commercial patients.