- Brug's filariasis 125.1
- Brugada syndrome 746.89
- Brugsch's syndrome (acropachyderma) 757.39
- Bruhl's disease (splenic anemia with fever) 285.8
- Bruise (skin surface intact) - see also Contusion
- Bruit 785.9
- Brushburn - see Injury, superficial, by site
- Bruton's X-linked agammaglobulinemia 279.04
- Bruxism 306.8
- Bubbly lung syndrome 770.7
- Bubo 289.3
- Bubonic plague 020.0
- Bubonocele - see Hernia, inguinal
- Buccal - see condition
- Buchanan's disease (juvenile osteochondrosis of iliac crest) 732.1
- Buchem's syndrome (hyperostosis corticalis) 733.3
- Buchman's disease (osteochondrosis, juvenile) 732.1
- Bucket handle fracture (semilunar cartilage) (see also Tear, meniscus) 836.2
- Budd-Chiari syndrome (hepatic vein thrombosis) 453.0
- Budgerigar-fanciers' disease or lung 495.2
- Büdinger-Ludloff-Läwen disease 717.89
- Buerger's disease (thromboangiitis obliterans) 443.1
