Health Care Service Corporation (HCSC) recently commissioned Milliman to conduct an independent review of its savings methodology used to estimate the financial impact of Health Advocacy Solutions (HAS), a high-intensity clinical program the company offers. In 2018, HCSC introduced the program, which by 2021 had grown to approximately 1.6 million members across 84 accounts. Our report describes the results. Our analysis examines claims data and computer code, internal documentation, and oral interviews with HCSC’s HAS program leads. The report includes discussion of the following: 

• Background of HCSC’s HAS program
• Assessment of the HAS program savings methodology
• Data and methodological considerations

This report was commissioned by Health Care Service Corporation.