- Saturnism, see Table of Drugs and Chemicals, lead
- Scald, scalding (accidental) (by) (from) (in), X19
- Scratched by,
- Seasickness, T75.3
- Self-harm NEC, see External cause by type, undetermined whether accidental or intentional
- Self-inflicted NEC (injury), see External cause by type, undetermined whether accidental or intentional
- Sequelae (of),
- Shock,
- Shooting, shot (accidental(ly)), see Discharge, firearm, by type
- Shoving by other person (accidentally), see Pushed, by other person
- Sickness,
- Sinking (accidental),
- Siriasis, X32
- Sitting (prolonged) (static), X50.1
- Slashed wrists, see Cut, self-inflicted
- Slipping (accidental) (on same level) (with fall), W01.0
- Sliver, wood, contact with, W45.8
- Smoldering (due to fire), see Exposure, fire
- Sodomy by force (attempted), T74.2-
- Sound waves (causing injury), W42.9
- Splinter, contact with, W45.8
- Stab, stabbing, see Cut
- Standing (prolonged) (static), X50.1
- Starvation, X58
- Status of external cause, Y99.9
- Stepped on,
- Stepping on,
- Sting,
- Storm (cataclysmic), see Forces of nature, cataclysmic storm
- Straining, excessive, see OverexertionX50.9
- Strangling, see Strangulation
- Strangulation (accidental),
- Strenuous movements, see OverexertionX50.9
- Striking against,
- Struck by (accidentally),
- Stumbling,
- Submersion (accidental), see Drowning
- Suffocation (accidental) (by external means) (by pressure) (mechanical), see categoryT71
- Suicide, suicidal (attempted) (by), X83.8
- Sunstroke, X32
- Supersonic waves (causing injury), W42.0
- Surgical procedure, complication of (delayed or as an abnormal reaction without mention of misadventure), see Complication of or following, by type of procedure
- Swallowed, swallowing,