• Bradypnea 786.09
  • Brailsford's disease 732.3
  • Brailsford-Morquio disease or syndrome (mucopolysaccharidosis IV) 277.5
  • Brain - see also condition
  • Branched-chain amino-acid disease 270.3
  • Branchial - see condition
  • Brandt's syndrome (acrodermatitis enteropathica) 686.8
  • Brash (water) 787.1
  • Brass-founders' ague 985.8
  • Bravais-Jacksonian epilepsy (see also Epilepsy) 345.5
  • Braxton Hicks contractions 644.1
  • Braziers' disease 985.8
  • Brazilian
  • BRBPR (bright red blood per rectum) 569.3
  • Break
  • Breakbone fever 061
  • Breakdown
  • Breast - see condition
  • Breast feeding difficulties 676.8
  • Breath
  • Breathing
  • Breathlessness 786.09