Medicare (Original Medicare / Part A & B)

Identity

Canonical name

Medicare (Original Medicare / Part A & B)

Also known as

CMS · Medicare FFS · Medicare Part B · Original Medicare · PECOS

Formerly known as

No recorded former names

Parent company

Centers for Medicare & Medicaid Services

Plan type

Government programs

Names matter on an application. A plan is frequently listed under a brand name that differs from the contracting entity, and a rename or acquisition can leave both names circulating for years. Filing under the wrong one is a common cause of rejected or misrouted applications.

Credentialing details

Provider portal

PECOS

CAQH ProView

Not used for this payer's credentialing

States covered

52 of 51

Lines of business

Government program

Government programs enroll providers through their own systems rather than commercial credentialing. Enrollment is usually a prerequisite for participating in the managed-care plans built on top of them.

Coverage by state

Lines of business are contracted per state. Being credentialed for one line in one state does not carry over to another. Data as of July 28, 2026.

Sources

• White Glove curated entity table — retrieved July 28, 2026

We name provider portals but do not link to payer websites — payer URLs move, and a stale link is worse than none. We verify current requirements directly with the payer at the start of every engagement.