| A | B |
|---|
| MLA | Medical Laboratory Assistant |
| MLN | Medicare Learning Network |
| MMA | Medicare Modernization Act of 1999 |
| MR | Medical Review |
| MRI | Magnetic Resonance Imaging |
| MT | Medical Technologist |
| MLT | Medical Laboratory Technician |
| MM | Materials Management |
| MSICU | Medical Surgical Intensive-Care Unit |
| MSN | Medicare Summary Notice |
| MSP | Medicare Secondary Payer |
| NEJM | New England Journal of Medicine |
| NAACLS | National Accrediting Agency for Clinical Laboratory Science |
| NCA | National Credentialing Agency for Laboratory Personnel |
| NCPDP | National Council for Prescription Drug Program |
| NFPA | National Fire Protection Association |
| NHC | Nephrology Hypertension Clinic, P.C. |
| NHS | National Health Service |
| NICE | National Institute for Health and Clinical Excellence |
| NICU | (1) Neonatal Intensive-Care Unit; (2) Neurotrauma Intensive-Care Unit; (3) Neuro-Intensive-Care Unit |
| NOC | Not Otherwise Classified |
| NPO | Nothing by mouth (Latin – nil per os) |
| OB | Obstetrics |
| OD | Doctor of Optometry (Optometrist) |
| OIC | Overnight Intensive Recovery |
