MDH may refer to:
Chemistry Malate dehydrogenase (S)-mandelate dehydrogenase Methanol dehydrogenase (cytochrome c) Methylenedioxyhydroxyamphetamine
Health and medicine Manila Doctors Hospital, in Ermita, Manila, Philippines Mater Dei Hospital, in Msida, Malta Milton District Hospital, in Milton, Ontario, Canada Minnesota Department of Health
Other uses MDH (spice company), an Indian spice producer and seller Maguindanao language (ISO 639-3: mdh) Mayotte Division Honneur, association football league in Mayotte, France Mälardalen University College (Mälardalens högskola; MdH), in Sweden Minimum descent height, for aircraft landing; see List of aviation, avionics, aerospace and aeronautical abbreviations Multidimensional hierarchical toolkit Southern Illinois Airport (IATA: MDH)