Monteggia's fracture (closed)  813.03 | 
   | 
  Mood swings  | 
   | 
  Moore's syndrome (see also Epilepsy)  345.5 | 
  Mooren's ulcer (cornea)  370.07 | 
  Mooser-Neill reaction  081.0 | 
   | 
  Moral  | 
   | 
  Morax-Axenfeld conjunctivitis  372.03 | 
  Morbilli (see also Measles)  055.9 | 
  Morbus  | 
   | 
  Morel-Kraepelin disease (see also Schizophrenia)  295.9 | 
  Morel-Moore syndrome (hyperostosis frontalis interna)  733.3 | 
  Morel-Morgagni syndrome (hyperostosis frontalis interna)  733.3 | 
  Morgagni  | 
   | 
  Morgagni-Adams-Stokes syndrome (syncope with heart block)  426.9 | 
  Morgagni-Stewart-Morel syndrome (hyperostosis frontalis interna)  733.3 | 
  Moria (see also Psychosis)  298.9 | 
   | 
   | 
  Morphea (guttate) (linear)  701.0 | 
  Morphine dependence (see also Dependence)  304.0 | 
  Morphinism (see also Dependence)  304.0 | 
  Morphinomania (see also Dependence)  304.0 | 
   | 
  Morquio (-Brailsford) (-Ullrich) disease or syndrome (mucopolysaccharidosis IV)  277.5 | 
   | 
  Morris syndrome (testicular feminization)  259.51 | 
  Morsus humanus (open wound) - see also Wound, open, by site  | 
   | 
  Mortification (dry) (moist) (see also Gangrene)  785.4 | 
  Morton's  | 
   | 
   | 
  Mosaicism, mosaic (chromosomal)  758.9 | 
   | 
  Moschcowitz's syndrome (thrombotic thrombocytopenic purpura)  446.6 | 
   | 
  Motion sickness (from travel, any vehicle) (from roundabouts or swings)  994.6 | 
  Mottled teeth (enamel) (endemic) (nonendemic)  520.3 | 
  Mottling enamel (endemic) (nonendemic) (teeth)  520.3 | 
   | 
  Mould(s) (in vitreous)  117.9 | 
  Moulders'  | 
   | 
  Mounier-Kuhn syndrome  748.3 | 
   | 
  Mountain  | 
   | 
  Mouse, joint (see also Loose, body, joint)  718.1 | 
   | 
  Mouth - see condition  | 
  Movable  | 
   | 
  Movement  | 
   | 
   | 
   | 
  MRSA (methicillin resistant staphylococcus aureus)  041.12 | 
   | 
  MSSA (methicillin susceptible staphylococcus aureus)  041.11 | 
   | 
  Mucha's disease (acute parapsoriasis varioliformis)  696.2 | 
 |  |