| Abbreviation | Definition |
|---|---|
| MERSI | Massachusetts Eye Research and Surgery Institution |
| MGOS | Melbourne Gastro Oesophageal Surgery |
| MICAS | Minimally Invasive Coronary Artery Surgery |
| MIFS | Minimally Invasive Foot Surgery |
| MIGS | Minimally Invasive Glaucoma Surgery |
| MIGS | Minimally Invasive Glaucoma Surgical |
| MIMIS | Minnesota Institute for Minimally Invasive Surgery |
| MIPS | Minimally Invasive Ponto Surgery |
| MISH | Minimally Invasive Surgery Hospital |
| MIVS | Minimal Incision Valve Surgery |
| ML | Microlaryngoscopy |
| MLSS | Mid Louisiana Surgical Specialists |
| MMRD | Mismatched Related Donor |
| MMSC | Marshalltown Medical and Surgical Center |
| MMSC | Marshalltown Medical Surgical Center |
| MOSA | Maryland Oral Surgery Associates |
| MOSG | Maryland Oral Surgery Group |
| MPJ | Metatarsal Phalangeal Joint (foot) |
| MRCP | Magnetic Resonance Cholangiopancreatogram (scan) |
| MRCS | Membership of the Royal Colleges of Surgeons |