| Abbreviation | Definition |
|---|---|
| MSIC | Medically Supervised Injection Centre |
| MSK | Memorial Sloan-Kettering Cancer Center |
| MSKCC | Memorial Sloan-Kettering Cancer Center |
| MSLH | Methodist Sugar Land Hospital |
| MSN | Medicare Summary Notice |
| MSNC | Morning Sickness Nutrition Clinic |
| MSOS | Medication Safety Officer Society |
| MSP | Medical Service Provider |
| MSRP | Medical Sciences Research Program |
| MSS | Maternal Serum Screening |
| MSS | Maternity Support Services |
| MSS | Medical Social Services |
| MST | Methodist Specialty and Transplant Hospital |
| MST | Military Sexual Trauma |
| MST | Morphine Sulphate Tablet |
| MSTH | Methodist Specialty and Transplant Hospital |
| MSU | Medical/Surgical Unit |
| MSWO | Multiple Stimulus WithOut replacement |
| MT | Medical Transcription |
| MTA | Medical Treatment after Accident |