Hospital Compare datasets

These are the official datasets used on the Medicare.gov 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.

Hospital Compare data was last updated on Apr 25, 2018.

Announcements:

  • January 26, 2018 update: The Hospital Compare Ambulatory Surgery Center facility level database was updated to correct data for a small group of providers whose data was truncated in the previous file.  No other changes were made to the data from the December 2017 release. 
  • You can now view Department of Defense hospital performance data on Hospital Compare and in the interactive datasets and downloadable database below.
  • CMS has added three new measures: Hospital Survey on Patient Safety Culture; Rate of unplanned hospital visits after an outpatient colonoscopy (OP-32); and Percentage of patients receiving appropriate radiation therapy for cancer spread to the bone (OP-33).
  • Beginning in December 2017, the following Inpatient Quality Reporting (IQR) Program measures will no longer be reported: Ischemic stroke patients who got medicine to break up a blood clot within 3 hours after symptoms started (STK-4); Patients with blood clots who were discharged on a blood thinner medicine and received written instructions about that medicine (VTE-5).
  • CMS updated the Overall Hospital Quality Star Ratings in December 2017. The Overall Hospital Quality Star Ratings incorporate several new enhancements to the Star Rating methodology based on stakeholder feedback. Please submit questions related to Star Ratings to cmsstarratings@lantanagroup.com.
  • As of July 2017, downloadable databases are provided in .csv format only. Access files for Hospital Compare archived data are still available. 
  • CLABSI and CAUTI data were suppressed for the July 2017 refresh. Visit QualityNet for more information.
  • Diagnosis coding switched from ICD-9 to ICD-10 in 2015. Data for the FY 2018 recalibrated PSI measures only represent the 15-month performance period of ICD-9 claims (7/1/14 to 9/30/15).
  • The data collection periods are different for VA hospitals for the following measure groups: Patient Safety Indicators, 30-day rates of readmission, and 30-day death (mortality) rates. To view the data collection periods, visit Hospital Compare.
  • For questions about the Hospital Compare data, contact hospitalcompare@hsag.com.
  • Get help using Data.Medicare.gov.
  • Get the latest updates on the data.

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