Medicare Fee-for-Service Provider Enrollment Contact List
Medicare operations are managed by independent contractors known as fee-for-service contractors.
The Medicare fee-for-service contractor serving your State or jurisdiction will answer your enrollment questions and process your enrollment
application.
An A/B MAC processes enrollment applications submitted by Part B suppliers (physicians, non-physician practitioners, and
the following organizations):
• Ambulance Service Supplier
• Ambulatory Surgical Center
• Clinics & Group Practices
• Independent Clinical Laboratory
• Independent Diagnostic Testing Facility
• Mammography Center
• Portable X-ray Supplier
• Radiation Therapy Center
Note: If your supplier type is not shown above, contact the designated carrier before you submit an enrollment application.
An A/B MAC processes enrollment applications submitted by the following Part A Providers/Organizations:
• Community Mental Health Center
• Comprehensive Outpatient Rehab
Facility
• Critical Access Hospital
• End-Stage Renal Disease Facility
• Federally Qualified Health Center
• Histocompatibility Laboratory
• Home Health Agency (HHA)
• Hospice
• Hospital
• Indian Health Services Facility
• Organ Procurement Organization
• Outpatient Physical
Therapy/Occupational
Therapy/Speech Pathology
Services
• Religious Non-Medical Health Care
Institution
• Rural Health Center
• Skilled Nursing Facility
Note: If your provider or supplier type is not shown above, contact the designated A/B MAC before you submit an enrollment application.