Exhibit 99.1 FOR IMMEDIATE RELEASE The Oncology Institute Reports Second Quarter 2025 Financial Results and Reaffirms Full Year 2025 Guidance CERRITOS, Calif., August 13, 2025 -- The Oncology Institute, Inc. (NASDAQ: TOI) ("TOI" or the "Company"), one of the largest value-based community oncology groups in the United States, today reported financial results for its three months ended June 30, 2025. Daniel Virnich, CEO of TOI, commented, "We delivered another strong quarter with over 20% year-over-year reven ...