- Stomatocytosis 282.8
- Stomatomycosis 112.0
- Stomatorrhagia 528.9
- Stone(s) - see also Calculus
- Stonecutters' lung 502
- Stonemasons'
- Stoppage
- Storm, thyroid (apathetic) (see also Thyrotoxicosis) 242.9
- Strabismus (alternating) (congenital) (nonparalytic) 378.9
- Strain - see also Sprain, by site
- Strands
- Strangulation, strangulated 994.7
- Strangury 788.1
- Straw itch 133.8
- Strawberry
- Streak, ovarian 752.0
- Strephosymbolia 315.01
- Streptobacillary fever 026.1
- Streptobacillus moniliformis 026.1
- Streptococcemia 038.0
- Streptococcicosis - see Infection, streptococcal
- Streptococcus, streptococcal - see condition
