• Missing - see also Absence
  • Misuse of drugs NEC (see also Abuse, drug, nondependent) 305.9
  • Mitchell's disease (erythromelalgia) 443.82
  • Mite(s)
  • Mitochondrial encephalopathy, lactic acidosis and stroke-like episodes (MELAS syndrome) 277.87
  • Mitochondrial neurogastrointestinal encephalopathy syndrome (MNGIE) 277.87
  • Mitral - see condition
  • Mittelschmerz 625.2
  • Mixed - see condition
  • Mljet disease (mal de Meleda) 757.39
  • Mobile, mobility
  • Mobitz heart block (atrioventricular) 426.10
  • Möbius'
  • Moeller (-Barlow) disease (infantile scurvy) 267
  • Mohr's syndrome (types I and II) 759.89
  • Mola destruens (M9100/1) 236.1
  • Molar pregnancy 631
  • Molarization, premolars 520.2
  • Mold(s) in vitreous 117.9
  • Molding, head (during birth) - omit code
  • Mole (pigmented) (M8720/0) - see also Neoplasm, skin, benign
  • Molimen, molimina (menstrual) 625.4