Medicine
- mammography
- managed health care
- Marriage counseling
- Marshall-Marchetti-Krantz procedure
- massage
- Massage Therapy
- Measles-mumps-rubella vaccines
- Mediastinoscopy
- Medicaid
- Medical records
- Medical research
- Medical sociology
- medical transplantation
- Medicare
- medicine
- Mental Status Examination
- mercy killing
- Meta-analysis
- microdissection
- Micromanipulation