Medicare Fee-for-Service (CMS)
Credentialing and enrollment guides for Medicare Fee-for-Service (CMS) across 0 states.
About Medicare Fee-for-Service (CMS)
Federal health insurance program. Enrollment via PECOS. CMS-855 forms required. Processed by Medicare Administrative Contractors (MACs).
Required Documents
Board Certification
Not required for Medicare enrollment but verified during credentialing
DEA License
Required if applicable
Malpractice Insurance
Medical License
NPI Certificate
Enrollment Forms
CMS-855I — Individual Practitioners
For physicians and non-physician practitioners enrolling as individuals who will bill Medicare directly or reassign benefits to a group.
CMS-855B — Group Practices / Organizations
For group practices, clinics, and organizations billing Medicare for services rendered by employed/contracted practitioners.
CMS-855O — Ordering/Certifying Only
For physicians who ONLY order or certify items/services for Medicare beneficiaries but do NOT bill Medicare directly.
CMS-855S — DMEPOS Suppliers
For suppliers of durable medical equipment, prosthetics, orthotics, and supplies.
CMS-855R — Reassignment of Benefits
Used when an individual practitioner reassigns their billing rights to a group practice.
Select Your State
Choose your state for Medicare Fee-for-Service (CMS)-specific credentialing details including timelines, contacts, and local requirements.