• Barlow (-Möller) disease or syndrome (meaning infantile scurvy) 267
  • Barlow's syndrome (meaning mitral valve prolapse) 424.0
  • Barodontalgia 993.2
  • Baron Münchausen syndrome 301.51
  • Barosinusitis 993.1
  • Barotitis 993.0
  • Barotrauma 993.2
  • Barraquer's disease or syndrome (progressive lipodystrophy) 272.6
  • Barré-Guillain syndrome 357.0
  • Barré-Liéou syndrome (posterior cervical sympathetic) 723.2
  • Barrel chest 738.3
  • Barrett's esophagus 530.85
  • Barrett's syndrome or ulcer (chronic peptic ulcer of esophagus) 530.85
  • Bársony-Polgár syndrome (corkscrew esophagus) 530.5
  • Bársony-Teschendorf syndrome (corkscrew esophagus) 530.5
  • Barth syndrome 759.89
  • Bartholin's
  • Bartholinitis (suppurating) 616.89
  • Bartonellosis 088.0
  • Bartter's syndrome (secondary hyperaldosteronism with juxtaglomerular hyperplasia) 255.13
  • Basal - see condition
  • Basan's (hidrotic) ectodermal dysplasia 757.31