• Bloating 787.3
  • Bloch-Siemens syndrome (incontinentia pigmenti) 757.33
  • Bloch-Stauffer dyshormonal dermatosis 757.33
  • Bloch-Sulzberger disease or syndrome (incontinentia pigmenti) (melanoblastosis) 757.33
  • Block
  • Blocq's disease or syndrome (astasia-abasia) 307.9
  • Blood
  • Blood-forming organ disease 289.9
  • Bloodgood's disease 610.1
  • Bloodshot eye 379.93
  • Bloom (-Machacek) (-Torre) syndrome 757.39
  • Blotch, palpebral 372.55
  • Blount's disease (tibia vara) 732.4
  • Blount-Barber syndrome (tibia vara) 732.4
  • Blue
  • Blueness (see also Cyanosis) 782.5
  • Blurring, visual 368.8
  • Blushing (abnormal) (excessive) 782.62
  • BMI (body mass index)
  • Boarder, hospital V65.0
  • Bockhart's impetigo (superficial folliculitis) 704.8
  • Bodechtel-Guttmann disease (subacute sclerosing panencephalitis) 046.2