| Abbreviation | Definition |
|---|---|
| M4EWG | ICH M4 Expert Working Group |
| MA | Marketing Authorization |
| MAA | Marketing Authorisation Application |
| MAA | Marketing Authorization Application |
| MAB | Management Analysis Branch |
| MAB | Methods Application Branch |
| mAB | Monoclonal AntiBody |
| MAB(CDER) | Management Analysis Branch (CDER) |
| MAB(CFSAN) | Methods Application Branch (CFSAN) |
| MAC | Mental Adjustment to Cancer scale |
| MACMIS | Marketing, Advertising and Communication Management Information System |
| MACS | Manufacturers Assistance and Communications Staff |
| MACS(CBER) | Manufacturers Assistance and Communications Staff (CBER) |
| MAD | Multiple Ascending Dose |
| MAH | Marketing Authorization Holder |
| MAPCB(CDER) | Manufacturing Assessment & Pre-Approval Compliance Branch (CDER) |
| MAPP | MAnual of Policy and Procedures |
| MARCS | Mission Accomplishment and Regulatory Compliance Services |
| MARCS | Mission Accomplishment and Regulatory Compliance Services System (ORA) |
| MARS | Mobile Automated Regulatory Services |