| Sphenoidal - see condition | 
  | Sphenoiditis (chronic) (see also Sinusitis, sphenoidal) 473.3 | 
  | Sphenopalatine ganglion neuralgia 337.09 | 
  | Sphericity, increased, lens 743.36 | 
  | Spherocytosis (congenital) (familial) (hereditary) 282.0 | 
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  | Sphincter - see condition | 
  | Sphincteritis, sphincter of Oddi (see also Cholecystitis) 576.8 | 
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  | Sphingolipodystrophy 272.7 | 
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  | Spider | 
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  | Spiegler-Fendt sarcoid 686.8 | 
  | Spielmeyer-Stock disease 330.1 | 
  | Spielmeyer-Vogt disease 330.1 | 
  | Spina bifida (aperta) 741.9 | 
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  | Spine, spinal - see condition | 
  | Spiradenoma (eccrine) (M8403/0) - see Neoplasm, skin, benign | 
  | Spirillosis NEC (see also Fever, relapsing) 087.9 | 
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  | Spirillum obermeieri infection 087.0 | 
  | Spirochetal - see condition | 
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  | Spitting blood (see also Hemoptysis) 786.3 | 
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  | Spleen, splenic - see also condition | 
  |  | 
  | Splenectasis (see also Splenomegaly) 789.2 | 
  | Splenitis (interstitial) (malignant) (nonspecific) 289.59 | 
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  | Splenomegalia - see Splenomegaly | 
  | Splenomegalic - see condition | 
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  | Splenopneumonia - see Pneumonia | 
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  | Splinter - see Injury, superficial, by site | 
  | Split, splitting | 
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  | Spoiled child reaction (see also Disturbance, conduct) 312.1 | 
  | Spondylarthritis (see also Spondylosis) 721.90 | 
  | Spondylarthrosis (see also Spondylosis) 721.90 | 
  |  | 
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  | Spondyloarthrosis (see also Spondylosis) 721.90 | 
  | Spondylolisthesis (congenital) (lumbosacral) 756.12 | 
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  | Spondylolysis (congenital) 756.11 | 
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  | Spondylopathy | 
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  | Spondylose rhizomelique 720.0 | 
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