| Abbreviation | Definition |
|---|---|
| MADRS | Montgomery Asberg Depression Rating Scale |
| MAF | Maximum Aerobic Function |
| MAHA | MicroAngiopathic Hemolytic Anemia |
| MAJ | Majority |
| MAL | Malignant |
| MAL | Mouth And Lips |
| MALT | Mucosa Associated Lymph Tissues |
| MAM | Melungeon Ancestral Medical |
| MAMA | Mothers Against Munchausen Accusations |
| MAOI | Monoamine Oxidase Inhibitor |
| MAOI(s) | monoamine oxidase inhibitor(s) |
| MAP | Managing Anxiety And Panic |
| MAP | Mean Aortic Pressure |
| MAP | Mean Arterial Pressure |
| MAP | Medical Assistant Physician |
| MAPA | Maryland Academy of Physician Assistants |
| MAPER | Miniature Access Pectus Excavatum Repair |
| MAPP | Multi Age Progressive Primary |
| MAR | Mixed Antiglobulin Reaction |
| MARS | Molecular Adsorbent Recirculating System |