CMS Data Portal
Centers for Medicare & Medicaid Services (CMS)
The CMS Data Portal provides access to administrative claims data, enrollment records, and quality measures for over 160 million Americans covered by Medicare, Medicaid, CHIP, and the Health Insurance Marketplace. Data is available through Public Use Files (free, de-identified) and Research Identifiable Files (restricted access requiring formal application).
Category
Open dataset
Access
Free registration
Region
US
Size
160+ million beneficiary records
License / terms
public domain
Data types
claims, enrollment, quality measures, provider performance