| Osteophytosis - see Exostosis | 
  |  | 
  | Osteoporosis (generalized) 733.00 | 
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  | Osteoporosis-osteomalacia syndrome 268.2 | 
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  | Osteoradionecrosis, jaw 526.89 | 
  | Osteosarcoma (M9180/3) - see also Neoplasm, bone, malignant | 
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  | Osteosis | 
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  | Osterreicher-Turner syndrome 756.89 | 
  | Ostium | 
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  | Otitic hydrocephalus 348.2 | 
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  | Otomycosis 111.8  [380.15] | 
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  | Otoporosis (see also Otosclerosis) 387.9 | 
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  | Otosclerosis (general) 387.9 | 
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  | Otospongiosis (see also Otosclerosis) 387.9 | 
  | Otto's disease or pelvis 715.35 | 
  | Outburst, aggressive (see also Disturbance, conduct) 312.0 | 
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  | Outcome of delivery | 
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  | Outlet - see also condition | 
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  | Outstanding ears (bilateral) 744.29 | 
  | Ovalocytosis (congenital) (hereditary) (see also Elliptocytosis) 282.1 | 
  | Ovarian - see also condition | 
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  | Ovaritis (cystic) (see also Salpingo-oophoritis) 614.2 | 
  | Ovary, ovarian - see condition | 
  | Overactive - see also Hyperfunction | 
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  | Overbite (deep) (excessive) (horizontal) (vertical) 524.29 | 
  | Overbreathing (see also Hyperventilation) 786.01 | 
  | Overconscientious personality 301.4 | 
  | Overdevelopment - see also Hypertrophy | 
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  | Overdistention - see Distention | 
  | Overdose overdosage (drug) 977.9 | 
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  | Overexertion (effects) (exhaustion) 994.5 | 
  | Overexposure (effects) 994.9 | 
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  | Overfeeding (see also Overeating) 783.6 | 
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  | Overhanging | 
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