- Barotitis, barodontalgia, barosinusitis, barotrauma (otitic) (sinus), see Air, pressure
- Battered (baby) (child) (person) (syndrome), X58
- Bayonet wound, W26.1
- Bean in nose, see categories T17 andT18
- Bed set on fire NEC, see Exposure, fire, uncontrolled, building, bed
- Beheading (by guillotine),
- Bending, injury in (prolonged) (static), X50.1
- Bends, see Air, pressure, change
- Bite, bitten by,
- Blast in war operations (air), see War operations, blast
- Blizzard, X37.2
- Blood alcohol level, Y90.9
- Blow, X58
- Blowing up, see Explosion
- Brawl (hand) (fists) (foot), Y04.0
- Breakage (accidental) (part of),
- Broken,
- Bumping against, into (accidentally),
- Burn, burned, burning (accidental) (by) (from) (on),
- Butted by animal, W55.82