- MedEquities Realty Trust
- Medica
- Medicaid
- Medicaid and CHIP Payment and Access Commission
- 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