M
- MAC
- Magnetic resonance cholangiopancreatography (MRCP)
- Magnetic resonance imaging
- Magnetic resonance imaging of the breast
- Magnetic resonance angiography
- Malone procedure
- Mammogram
- Mammography
- Mammoplasty, augmentation
- Mandibular osteotomy
- Marshall-Marchetti-Krantz procedure
- Mastectomy
- Maxillary osteotomy
- Maxillofacial surgery
- Maze procedure--open surgery
- MCV4 vaccine
- Measles vaccine
- Medial branch block
- Mediastinal tumor resection
- Medicine, bloodless
- Medistinoscopy
- Medistinotomy
- Melanoma removal
- Meningococcal vaccine
- Meniscectomy
- Meniscus removal
- Microvascular clipping
- Microvascular occlusion
- Middle ear repair
- Mini-incision hip replacement
- Mini-maze procedure--minimally invasive surgery
- Minimally invasive repair of abdominal aortic aneurysm
- Minimally invasive total hip replacement
- Mitral valve replacement
- MMR vaccine-measles
- MMR vaccine-mumps
- MMR vaccine-rubella
- Moderate sedation
- Mohs micrographic surgery
- Monitored anesthesia care
- Monoclonal antibody scan
- Morton's neuroma removal
- MRCP
- MRI
- MRI angiography
- MRI-guided breast biopsy
- MRI scan
- Mumpsvaccine
- Myelogram
- Myelography for detecting a herniated disk
- Myocardial perfusion imaging
- Myomectomy
- Myomectomy - laparoscopic
- Myringotomy