| Abbreviation | Definition |
|---|---|
| MDA | Medical Devices Agency |
| MDB | Medical Devices Bureau (Canada) |
| MDB | Methods Development Branch |
| MDB(CFSAN) | Methods Development Branch (CFSAN) |
| MDCN | Medicare Data Communication Network |
| MDD | Maximum Daily Dose |
| MDD | Medical Devices Directorate |
| MDDRP | Medical Device Dispute Resolution Panel |
| MDI | Metered Dose Inhaler |
| MDII | Medical Device Innovation Initiative |
| MDL | MoDeL number |
| MDMA | Medical Device Manufacturers Association |
| MDP | Medical Devices Program |
| MDR | Medical Device Reporting |
| MDUFA | Medical Device User Fee Amendments of 2007 |
| MDUFMA | Medical Device User Fee and Modernization Act of 2002 |
| MDUFSA | Medical Device User Fee Stabilization Act of 2005 |
| MDV | Medical Device Vigilance |
| ME | Medical Examiner |
| MedDRA | Medical Dictionary for Regulatory Activities |