Hospital Compare datasets

These are the official datasets used on the Hospital Compare Website provided by the Centers for Medicare & Medicaid Services. These data allow you to compare the quality of care at over 4,000 Medicare-certified hospitals across the country.

Downloading data

  • Click on the blue buttons to download the datasets in Microsoft Access and Zipped comma-separated values (CSV) format (see Downloading data), or
  • Click on the list of individual datasets at the bottom of the page to view and explore data in a browser (see Explore & view data for more information).
  • Filter the list of official datasets by category.


- October 1, 2015 update: IMM-3 and OP-27 are combined and reported as one measure rather than listing the measures separately. The Measure ID IMM-3_OP-27 includes data from both the inpatient measures IMM-3, and the outpatient measure OP-27.

- June 22, 2015 update: Get the April 2015 Process of Care Data for selected Critical Access Hospitals.


- For questions about the Hospital Compare data, contact

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