| Sinusitis (accessory) (nasal) (hyperplastic) (nonpurulent) (purulent) (chronic) 473.9 | 
  |  | 
  | Sinusitis-bronchiectasis-situs inversus (syndrome) (triad) 759.3 | 
  | Sipple's syndrome (medullary thyroid carcinoma-pheochromocytoma) 258.02 | 
  |  | 
  |  | 
  |  | 
  | SIRS (systemic inflammatory response syndrome) 995.90 | 
  |  | 
  |  | 
  |  | 
  | Situation, psychiatric 300.9 | 
  | Situational | 
  |  | 
  | Situs inversus or transversus 759.3 | 
  |  | 
  | Sixth disease | 
  |  | 
  | Sjögren (-Gougerot) syndrome or disease (keratoconjunctivitis sicca) 710.2 | 
  |  | 
  | Sjögren-Larsson syndrome (ichthyosis congenita) 757.1 | 
  | SJS-TEN (Stevens-Johnson syndrome-toxic epidermal necrolysis overlap syndrome) 695.14 | 
  | Skeletal - see condition | 
  | Skene's gland - see condition | 
  | Skenitis (see also Urethritis) 597.89 | 
  |  | 
  |  | 
  | Skevas-Zerfus disease 989.5 | 
  | Skin - see also condition | 
  |  | 
  | SLAP lesion (superior glenoid labrum) 840.7 | 
  |  | 
  |  | 
  | Sleep | 
  |  | 
  |  | 
  |  | 
  | Sleeplessness (see also Insomnia) 780.52 | 
  |  | 
  | Slipped, slipping | 
  |  | 
  |  | 
  | Sloughing (multiple) (skin) 686.9 | 
  |  | 
  | Slow | 
  |  | 
  | Slowing | 
  |  | 
  | Sluder's neuralgia or syndrome 337.09 | 
  | Slurred, slurring, speech 784.5 | 
  | Small, smallness | 
  |  | 
  | Small-for-dates (see also Light-for-dates) 764.0 | 
  |  | 
  |  | 
  |  | 
  | Smith's fracture (separation) (closed) 813.41 | 
  |  | 
  | Smith-Lemli-Opitz syndrome (cerebrohepatorenal syndrome) 759.89 | 
  |  | 
  | Smith-Strang disease (oasthouse urine) 270.2 | 
  | Smokers' | 
  |  | 
  | Smoking complicating pregnancy, childbirth, or the puerperium 649.0 | 
  |  | 
  |  | 
  | Snapping | 
  |  | 
  | Sneddon-Wilkinson disease or syndrome (subcorneal pustular dermatosis) 694.1 | 
  |  | 
  |  | 
  | Sniffing | 
  |  | 
|  |  |