| MHI | malignant histiocytosis of intestine; Mental Health Index; Mental Health Inventory |
|---|---|
| MHIQ | McMaster health index questionnaire |
| MHL | medial hypothalamic lesion |
| MHLC | Multidimensional Health Locus of Control |
| MHLS | metabolic heat load stimulator |
| MHN | massive hepatic necrosis; Mohs hardness number; morbus hemolyticus neonatorum |
| MHO | microsomal heme oxygenase |
| mho | reciprocal ohm, siemens unit [ohm spelled backwards] |
| MHP | hemiplegic migraine; maternal health program; maternal health program; medical center health plan; 1-mercuri-2-hydroxypropane; metropolitan health plan; monosymptomatic hypochondriacal psychosis; multi-skilled health practitioner |
| MHPA | mild hyperphenylalaninemia |