- Medical Care Research and Review
- Medical Properties Trust
- Medical University of South Carolina
- Medicalodges
- Medicare
- Medicare Advantage
- Medicare Payment Advisory Commission
- Medistar
- MediTelecare
- Medline
- Medline Industries
- MedPAC
- Medrina
- Menno Haven
- Menorah Center for Rehabilitation and Nursing Care
- Menorah Manor
- Mercer
- Merck
- Mercy Health Services
- Mercy Ministries