| Abbreviation | Definition |
|---|---|
| MD | Muscular Dystrophy |
| MD | Myocardial Damage |
| MD | Myotonic Dystrophy |
| MDA | Methylene Dioxy Amphetamine |
| MDA | Minimum Detectable Activity |
| MDAC | Multiple Dose Activated Charcoal |
| MDAD | Maternal depression and anxiety disorders |
| MDC | Major Diagnostic Category |
| MDC | Minimum Detectable Concentration |
| MDD | Major Depressive Disorder |
| MDD | Mal De Debarquement Syndrome |
| MdDS | Mal de Debarquement Syndrome |
| MDE | Major Depressive Episode |
| MDH | Michigan Department of Health |
| MDI | Measured Dose Inhaler |
| MDI | Metered Dose Inhaler |
| MDI | Multiple Dose Inhaler |
| MDL | Minimum Detection Limit |
| MDPI | Multidose Dry Powder Inhaler |
| MDR | Manifestation Determination Review |