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About the Report Card Ratings

The Health Care Quality Report Cards are created using several sources of data. Learn more about the specific data sources and methodology for calculating the ratings for each report card below.


The Health Care Quality Report Cards were established by the Office of the Patient Advocate (OPA), with the first report card on health plans published in 2001. OPA expanded the Report Cards in subsequent years to address medical group quality and cost data. Due to a statutory change in October 2021, OPA’s Report Cards transitioned to the Center for Data Insights and Innovation.

Report Card Methodologies

Data Partners

Our data partners are leaders in measuring and aggregating health care performance data. We are proud to work with the National Committee for Quality Assurance, the Integrated Healthcare Association, and the Purchaser Business Group on Health in our efforts to improve and report on health care performance quality.

Requesting Data From CDII

Some of the data files from prior annual Health Care Quality Report Cards published by OPA are available through the CalHHS Open Data Portal.

Files for other editions of the Health Care Quality Report Cards may be available upon request. To request a data file, please provide the following information:

  1. Your name, title and contact information
  2. Name of your organization
  3. Research topic and an explanation on how the data will be used and/or published
  4. The data that you need.

Please email your request to for CDII to review.