CMS Socrata Open Data API (data.cms.gov)

data.cms.gov hosts hundreds of CMS datasets including Medicare Fee-for-Service utilization and payment data, Provider of Services files, Medicare Part B/D Prescriber summaries, Marketplace open enrollment data, and COVID-19 nursing home data, available via the data.cms.gov Data API (JSON) and the CMS Provider Data Catalog Socrata-compatible endpoints.