• Brown's tendon sheath syndrome 378.61
  • Brown-Séquard's paralysis (syndrome) 344.89
  • Brucella, brucellosis (infection) 023.9
  • Bruck's disease 733.99
  • Bruck-de Lange disease or syndrome (Amsterdam dwarf, intellectual disabilities, and brachycephaly) 759.89
  • 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