- Buerger's disease (thromboangiitis obliterans) 443.1
- Bulbar - see condition
- Bulbus cordis 745.9
- Bulging fontanels (congenital) 756.0
- Bulimia 783.6
- Bulky uterus 621.2
- Bulla(e) 709.8
- Bullet wound - see also Wound, open, by site
- Bullis fever 082.8
- Bullying (see also Disturbance, conduct) 312.0
- Bundle
- Bungpagga 040.81
- Bunion 727.1
- Bunionette 727.1
- Bunyamwera fever 066.3
- Buphthalmia, buphthalmos (congenital) 743.20
- Bürger-Grütz disease or syndrome (essential familial hyperlipemia) 272.3
- 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
