- Scoliosis (acquired) (postural) 737.30
- Scoliotic pelvis 738.6
- Scorbutus, scorbutic 267
- Scotoma (ring) 368.44
- Scratch - see Injury, superficial, by site
- Scratchy throat 784.99
- Screening (for) V82.9
- Scrofula (see also Tuberculosis) 017.2
- Scrofulide (primary) (see also Tuberculosis) 017.0
- Scrofuloderma, scrofulodermia (any site) (primary) (see also Tuberculosis) 017.0
- Scrofulosis (universal) (see also Tuberculosis) 017.2
- Scrofulosis lichen (primary) (see also Tuberculosis) 017.0
- Scrofulous - see condition
- Scrotal tongue 529.5
- Scrotum - see condition
- Scurvy (gum) (infantile) (rickets) (scorbutic) 267
- Sea-blue histiocyte syndrome 272.7
- Seabright-Bantam syndrome (pseudohypoparathyroidism) 275.49
- Sealpox 059.12
- Seasickness 994.6
- Seatworm 127.4
- Sebaceous