Every Medicare-billed (hospital × patient ZIP) pair — 1,155,777 records. Per row: Medicare provider number (CCN), patient ZIP of residence, total days of care, total charges, total cases. Cells under 11 cases are suppressed (CMS privacy protection). Maps every hospital's true patient catchment area. Joins with cms_hospitals + cms_hospital_owners by CCN.
Every record in this dataset can be traced back to its primary source at https://data.cms.gov/provider-data/dataset/hospital-service-area. Underlying content is a US federal government work (public domain under 17 USC §105); our derived data is licensed CC0 1.0.