- Sapremia - see Septicemia
- Sarcocele (benign)
- Sarcoepiplocele (see also Hernia) 553.9
- Sarcoepiplomphalocele (see also Hernia, umbilicus) 553.1
- Sarcoid (any site) 135
- Sarcoidosis 135
- Sarcoma (M8800/3) - see also Neoplasm, connective tissue, malignant
- Sarcomatosis
- Sarcosinemia 270.8
- Sarcosporidiosis 136.5
- Satiety, early 780.94
- Saturnine - see condition
- Saturnism 984.9
- Satyriasis 302.89
- Sauriasis - see Ichthyosis
- Sauriderma 757.39
- Sauriosis - see Ichthyosis
- Savill's disease (epidemic exfoliative dermatitis) 695.89
- SBE (subacute bacterial endocarditis) 421.0
- Scabies (any site) 133.0
- Scabs 782.8
- Scaglietti-Dagnini syndrome (acromegalic macrospondylitis) 253.0
