Centers for Medicare & Medicaid Services

What Visitors Should Know

Learn how the Centers for Medicare & Medicaid Services works, what public-facing services, records, or data it provides, and where visitors can verify official source links.

The Centers for Medicare & Medicaid Services administers Medicare, Medicaid, CHIP, Marketplace standards, health-care payment systems, quality reporting, provider data, coverage guidance, and program oversight with states and health-care partners. This profile explains the agency in practical terms: what it is responsible for, how people may encounter it, and which public-facing records or services matter most.

Visitors may use CMS sources to compare Medicare options, understand Medicaid or CHIP policy, find provider data, follow coverage rules, review payment updates, and use Marketplace-related information. Use CMS.gov, Medicare.gov, Medicaid.gov, HealthCare.gov, rulemaking notices, data portals, and official manuals to verify current coverage, enrollment rules, quality data, and payment policies. When legal precision, benefits, applications, deadlines, or compliance rules matter, use those official sources before relying on a summary.