- Buried roots 525.3
- Burke's syndrome 577.8
- Burkitt's
- Burn (acid) (cathode ray) (caustic) (chemical) (electric heating appliance) (electricity) (fire) (flame) (hot liquid or object) (irradiation) (lime) (radiation) (steam) (thermal) (x-ray) 949.0
- Burnett's syndrome (milk-alkali) 275.42
- Burnier's syndrome (hypophyseal dwarfism) 253.3
- Burning
- Burns' disease (osteochondrosis, lower ulna) 732.3
- Bursa - see also condition
- Bursitis NEC 727.3
- Burst stitches or sutures (complication of surgery) (external) (see also Dehiscence) 998.32
- Buruli ulcer 031.1
- Bury's disease (erythema elevatum diutinum) 695.89
- Buschke's disease or scleredema (adultorum) 710.1
- Busquet's disease (osteoperiostitis) (see also Osteomyelitis) 730.1
- Busse-Buschke disease (cryptococcosis) 117.5
- Buttock - see condition
- Button
- Buttonhole hand (intrinsic) 736.21
- Bwamba fever (encephalitis) 066.3
- Byssinosis (occupational) 504
- Bywaters' syndrome 958.5
