Browse Medical Abbreviations
M
| m | minim; meta; muscle; molar; meter; medicine; mother |
| M | myopia; mix (misce); master; male; thousand |
| M&F | mother and father |
| M-CSF | macrophage colony-stimulating factor |
| M. tb | mycobacterium tuberculosis |
| M/Hx | medical history |
| M/S | musculoskeletal |
| M/uL | million per microliter |
| M1 | mitral first sound |
| M2 | mitral second sound |
| MA | mental age; medical assistance |
| mA | milliampere |
| MABP | mean arterial blood pressure |
| MAC | mycobacterium avium complex; monitored anesthesia care |
| MAD | multiple autoimmune disorder |
| MADD | mothers against drunk driving |
| MAE | moving all extremities |
| MAFO | molded ankle foot orthosis |
| Mag | magnesium |
| MAI | mycobacterium avium intracellular |
| MAL | mid-axillary line |
| MALT | mucosa-associated lymphoid tissue |
| MAMC | midarm muscle circumference |
| man. prim. | first thing in the morning |
| mand | mandatory; mandible, mandibular |
| MAO | monoamine oxidase |
| MAO-B | monoamine oxidase-b |
| MAOI | monoamine oxidase inhibitor |
| MAP | mean arterial pressure |
| MAR | medication administration record |
| MASH | mobile army surgical hospital |
| MAST | military anti-shock trousers |
| mast | mastectomy |
| MAT | miller analogies test; modular antigen transporter |
| max | maxilla, maxillary; maximum |
| MBC | maximum breathing capacity |
| MBD | minimal brain dysfunction |
| MBPS | Munchausen-by-proxy syndrome |
| MC | medical corps |
| mc | millicurie |
| MC&S | microscopy, culture, and sensitivity |
| MCA | middle cerebral artery; motor cycle accident; mental capacity act |
| MCAD | medium-chain acyl-CoA dehydrogenase (deficiency) |
| MCAT | Medical College Admissions Test |
| MCC | major complication or comorbidity; motorcycle collision |
| MCD | multiple carboxylase deficiency |
| MCF | middle cranial fossa |
| mcg | microgram |
| MCH | mean corpuscular hemoglobin; maternal and child health |
| MCh | Master of Surgery (magister chirurgiae) |
| MCHB | Maternal and Child Health Bureau |
| MCHC | mean corpuscular hemoglobin concentration |
| MCI | mild cognitive impairment; mass casualty incident |
| mCi | millicurie |
| MCL | mid-clavicular line; medial collateral ligament; maximum contamination level; mantle cell lymphoma |
| MCM | medical countermeasure |
| MCO | managed care organization |
| MCP | metacarpal phalangeal |
| MCPJ | metacarpophalangeal joint |
| MCQ | multiple-choice question |
| MCV | meningococcal vaccine; mean corpuscular volume |
| MD | muscular dystrophy; medical doctor; Meniere's disease |
| MDA | medical device alert |
| MDD | maximum daily dose; major depressive disorder |
| MDE | major depressive episode |
| MDI | metered dose inhaler |
| MDR | multi-drug resistant; minimum daily requirement |
| MDR TB | multi-drug resistant tuberculosis |
| MDS | Master of Dental Surgery; minimum data set; myelodysplastic syndrome |
| MDT | multidisciplinary team |
| MDU | Medical Defence Union |
| ME | medical examiner; muscle energy; myalgic encephalomyelitis |
| ME ratio | myeloid/erythroid ratio |
| MEA | multiple endocrine adenomatosis |
| med | medical; medial (toward middle); medicine, medication |
| MED | minimum effective dose |
| med neb | medication nebulizer |
| meds | medicines |
| MEFR | maximum expiratory flow rate |
| MEG | magnetoencephalography |
| MELD | model for end-stage liver disease |
| mem | member; memory |
| MEN | multiple endocrine neoplasia |
| MEO | most efficient organization |
| mEq | milliequivalent |
| mEq/L | milliequivalent per liter |
| MERT | medical emergency response team |
| MET | metabolic ratio equivalent |
| Met | methionine |
| metab | metabolic, metabolism |
| mets | metastasis |
| MF | mid forceps |
| MFC | medial femoral condyle |
| MFFD | medically fit for discharge |
| MFM | maternal fetal medicine |
| mfr | manufacturer |
| mg | milligram (one thousandth of a gram) |
| Mg | Magnesium (element) |
| MG | myasthenia gravis |
| mg/dl | milligrams per deciliter |
| mgA | antibody (allergy testing) |
| MGF | maternal grandfather |
| MGL | IgM phospholipid unit |
| MGM | maternal grandmother |
| MgSO4 | magnesium sulfate |
| MH | mental health; malignant hyperthermia; medical history |
| MHC | Mental Health Center; major histocompatibility complex |
| MHE | mental health evaluator |
| MHI | mild head injury |
| MHR | maternal heart rate; maximum heart rate |
| MHT | menopause hormone therapy; mental health therapist |
| MHU | mental health unit |
| mHz | megahertz (1 million hertz) |
| MI | mental illness; myocardial infarction; mitral insufficiency |
| MI-CD | mentally ill and chemically dependent |
| MI-D | mentally ill and dangerous |
| MIC | methyl isocyanate; minimum inhibitory concentration |
| microg | microgram |
| microIU | micro-international unit |
| MICU | medical intensive care unit |
| MID | multi-infarct dementia; minimum infective dose |
| mid | middle |
| MIF | melanocyte-inhibiting factor |
| Min | minute; minimum |
| MIP | Managed Indemnity Program/Plan |
| MIS | management information system/service; misoprostol |
| misc | miscellaneous |
| mist. | a mixture |
| mIU | milli-international unit |
| MIVA | monitored intravenous anesthesia |
| mJ | millijoule |
| ML | midline |
| ml | milliliter (0.001 L) |
| MLBW | moderate to low birthweight |
| MLC | midline catheter; multi lumen catheter |
| MLD | median lethal dose; metachromatic leukodystrophy; minimum lethal dose |
| MLE | midline episiotomy |
| MLF | medial longitudinal fasciculus |
| MLPA | multiplex ligation dependent probe amplification |
| MLT | medical laboratory technician |
| MM | malignant melanoma; multiple myeloma; mucous membrane |
| mM | millimole |
| mm | millimeter (0.001 m) |
| mm3 | cubic millimeter |
| MMA | methylmalonic acid |
| MMEFR | maximal mid-expiratory flow rate |
| MMF | maxillomandibular fixation |
| MMFR | maximum mid-expiratory flow rate |
| mmHg | millimeter of mercury |
| MMI | methimazole |
| mmol | millimole (1/1000th of a mole) |
| mMol | millimole |
| MMPI | Minnesota Multiphasic Personality Inventory |
| MMR | (DNA) mismatch repair; measles-mumps-rubella (vaccine) |
| MMSE | mini mental state examination |
| MMT | manual muscle test |
| Mn | Manganese (element) |
| MN | Master of Nursing; myoneural |
| MND | motor neuron disease |
| MNT | medical nutrition therapy |
| mo | month |
| Mo | Molybdenum (element) |
| MO | medical officer; months old |
| MOA | memorandum of agreement; mechanism of action |
| MOAB | monoclonal antibodies |
| MoCA | Montreal Cognitive Assessment |
| MODS | multiple organ dysfunction syndrome |
| MODY | maturity-onset diabetes of the young |
| MOI | mechanism of injury |
| mol | mole |
| mol wt | molecular weight |
| MOM | milk of magnesia |
| MONA | morphine, oxygen, nitrates, aspirin |
| mono | monocyte; mononucleosis |
| mor. dict. | as directed |
| mor. sol. | as accustomed |
| mOs | milliosmole |
| mOsm | milliosmole |
| MOU | memorandum of understanding |
| mp | as directed (modo praescripto) |
| MP | midplane; menstrual period/pain |
| MP MIA | microlatex particle mediated immunoassay |
| MPAP | mean pulmonary artery pressure |
| MPB | multipodus boot |
| MPC | maximum permitted concentration; mucopurulent cervicitis |
| MPD | myeloproliferative disorders; multiple personality disorder |
| MPH | miles per hour; Master of Public Health |
| MPJ | metacarpophalangeal joint |
| MPN | most probable number |
| MPS | mucopolysaccharidosis; Medical Protection Society |
| MPV | mean platelet volume |
| mr | milliroentgen |
| MR | magnetic resonance; mitral regurgitation; mental retardation; medical record |
| MRA | magnetic resonance angiography |
| Mrad | megarad |
| mrad | millirad |
| MRC | medical research council |
| MRCP | magnetic resonance cholangiopancreatography |
| mrem | millirem |
| MRF | melanocyte-stimulating hormone-releasing factor |
| MRG | murmur rub gallop |
| MRgFUS | MR-guided focused ultrasound surgery |
| MRI | magnetic resonance imaging |
| mRNA | messenger RNA; messenger ribonucleic acid |
| MRS | magnetic resonance spectroscopy |
| MRSA | methicillin-resistant staphylococcus aureus |
| MRSE | methicillin-resistant staphylococcus epidermidis |
| MS | morphine sulfate; Master of Science; musculoskeletal; multiple sclerosis; mitral stenosis; mass spectroscopy; mass spectrometry |
| mS | millisecond |
| MSA | multiple system atrophy |
| MSAFP | maternal serum alpha-fetoprotein |
| MSDS | material safety data sheet |
| MSE | mental status examination |
| MSF | meconium stained fluid |
| MSG | monosodium glutamate |
| MSH | melanocyte-stimulating hormone |
| MSI | magnetic source imaging; microsatellite instability |
| MSk | musculoskeletal |
| MSL | midsternal line |
| MSN | Master of Science in Nursing |
| MSOF | multi system organ failure |
| MSR | motor sensory reflex |
| MST | multi-systemic therapy |
| MSU | midstream specimen of urine; monosodium urate monohydrate |
| MSW | Master of Social Work; medical social worker |
| MT | medical technologist |
| MTB | mycobacterium tuberculosis |
| MTBI | mild traumatic brain injury |
| MTC | medullary thyroid cancer |
| MTD | maximum tolerated dose; month-to-date |
| mthy | monthly |
| MTP | metatarsal phalangeal |
| MTPJ | metatarsophalangeal joint |
| MTX | methotrexate |
| mU | milliunit; micro unit |
| MUA | medically underserved areas |
| MUD | matched unrelated donor |
| MUFA | monounsaturated fatty acids |
| MUGA | multiple gated acquisition |
| mult | multiple |
| MUS | medically unexplained symptoms |
| musc | muscle |
| MUT | Methylmalonyl-CoA mutase deficiency |
| mV | millivolt |
| MV | mitral valve |
| mv. | movement |
| MVA | motor vehicle accident |
| MVC | motor vehicle collision |
| MVI | multivitamin (injection) |
| MVO2 | myocardial oxygen consumption |
| MVP | mitral valve prolapse |
| MVR | mitral valve repair/replacement/regurgitation |
| MVS | mitral valve stenosis; motor, vascular, and sensory |
| MVV | maximum voluntary ventilation; maximum ventilatory volume |
| MW | molecular weight; microwave |
| mx. | maxillary |
| MxT | myringotomy and tubes |
| My | myopia |
Return to: Medical Abbreviations & Acronyms
This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Abbreviations vary by context and institution. Many abbreviations have alternate or newer meanings not reflected in this set. The abbreviations on this page should not be considered complete.