| Abbreviation | Definition |
|---|---|
| MGB(CFSAN) | Molecular Genetics Branch (CFSAN) |
| MGSS | Multi-Generation Support System |
| MHBG | Mental Health Services Block Grant |
| MHPF | Minority Health Professionals Foundation |
| MHRA | Medicines and Healthcare products Regulatory Agency (UK) |
| MHSB | Microbial Hazards Science Branch |
| MHSB(CFSAN) | Microbial Hazards Science Branch (CFSAN) |
| MHW | Ministry of Health and Welfare (Japan) |
| MI | Myocardial Infarction |
| MIC | Minimum Inhibitory Concentration |
| MID | Manufacturer IDentifier |
| MIP | Management Improvement Plan |
| MIRA | Medicare Innovation Responsiveness Act of 2003 |
| MIS | Management Initiatives Staff |
| MIS | Medicaid Information System |
| MIS | Medical Information System |
| MIS(OC) | Management Initiatives Staff (OC) |
| MITA | Medicaid Information Technology Architecture |
| MIWG | Mentoring Implementation Working Group |
| MJ | Major Amendment |