• Marchand multiple nodular hyperplasia (liver) 571.5
  • Marchesani (-Weill) syndrome (brachymorphism and ectopia lentis) 759.89
  • Marchiafava (-Bignami) disease or syndrome 341.8
  • Marchiafava-Micheli syndrome (paroxysmal nocturnal hemoglobinuria) 283.2
  • Marcus Gunn's syndrome (jaw-winking syndrome) 742.8
  • Marfan's
  • Marginal
  • Marie's
  • Marie-Bamberger disease or syndrome (hypertrophic) (pulmonary) (secondary) 731.2
  • Marie-Charcôt-Tooth neuropathic atrophy, muscle 356.1
  • Marie-Strümpell arthritis or disease (ankylosing spondylitis) 720.0
  • Marihuana, marijuana
  • Marion's disease (bladder neck obstruction) 596.0
  • Marital conflict V61.10
  • Mark
  • Maroteaux-Lamy syndrome (mucopolysaccharidosis VI) 277.5
  • Marriage license examination V70.3
  • Marrow (bone)
  • Marseilles fever 082.1
  • Marsh fever (see also Malaria) 084.6
  • Marsh's disease (exophthalmic goiter) 242.0
  • Marshall's (hidrotic) ectodermal dysplasia 757.31