| Maceration | 
  |  | 
  | Machado-Joseph disease 334.8 | 
  | Machupo virus hemorrhagic fever 078.7 | 
  | Macleod's syndrome (abnormal transradiancy, one lung) 492.8 | 
  | Macrocephalia, macrocephaly 756.0 | 
  | Macrocheilia (congenital) 744.81 | 
  | Macrochilia (congenital) 744.81 | 
  | Macrocolon (congenital) 751.3 | 
  |  | 
  |  | 
  | Macrocytic - see condition | 
  |  | 
  | Macrodactylia, macrodactylism (fingers) (thumbs) 755.57 | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Macrogenitosomia (female) (male) (praecox) 255.2 | 
  |  | 
  | Macroglobulinemia (essential) (idiopathic) (monoclonal) (primary) (syndrome) (Waldenström's) 273.3 | 
  | Macroglossia (congenital) 750.15 | 
  |  | 
  | Macrognathia, macrognathism (congenital) 524.00 | 
  |  | 
  | Macrogyria (congenital) 742.4 | 
  | Macrohydrocephalus (see also Hydrocephalus) 331.4 | 
  | Macromastia (see also Hypertrophy, breast) 611.1 | 
  | Macrophage activation syndrome 288.4 | 
  |  | 
  |  | 
  |  | 
  | Macrospondylitis, acromegalic 253.0 | 
  | Macrostomia (congenital) 744.83 | 
  | Macrotia (external ear) (congenital) 744.22 | 
  | Macula | 
  |  | 
  |  | 
  | Macules and papules 709.8 | 
  |  | 
  |  | 
  | Madelung's | 
  |  | 
  | Madness (see also Psychosis) 298.9 | 
  |  | 
  | Madura | 
  |  | 
  | Maduromycosis (actinomycotic) 039.9 | 
  |  | 
  | Maffucci's syndrome (dyschondroplasia with hemangiomas) 756.4 | 
  | Magenblase syndrome 306.4 | 
  | Main en griffe (acquired) 736.06 | 
  |  | 
  | Maintenance | 
  |  | 
  | Majocchi's | 
  |  | 
  | Major - see condition | 
  | Mal | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Malacoplakia | 
  |  | 
  |  | 
  |  | 
|  |  |