- Magnetic Resonance Imaging
- Mammography
- Managed Care Plans
- Mastoidectomy
- Maze Procedure for Atrial Fibrillation
- Mechanical Circulation Support
- Mechanical Ventilation
- Meckel's Diverticulectomy
- Mediastinoscopy
- Medicaid
- Medical Charts
- Medical Errors
- Medicare
- Meningocele Repair
- Mentoplasty
- Microsurgery
- Minimally Invasive Heart Surgery
- Mitral Valve Repair
- Mitral Valve Replacement
- Modified Radical Mastectomy
- Mohs Surgery
- Multiple-Gated Acquisition (MUGA) Scan
- Muscle Relaxants
- Myelography
- Myocardial Resection
- Myomectomy
- Myringotomy and Ear Tubes
