• Approximal wear 521.10
  • Apraxia (classic) (ideational) (ideokinetic) (ideomotor) (motor) 784.69
  • Aptyalism 527.7
  • Aqueous misdirection 365.83
  • Arabicum elephantiasis (see also Infestation, filarial) 125.9
  • Arachnidism 989.5
  • Arachnitis - see Meningitis
  • Arachnodactyly 759.82
  • Arachnoidism 989.5
  • Arachnoiditis (acute) (adhesive) (basic) (brain) (cerebrospinal) (chiasmal) (chronic) (spinal) (see also Meningitis) 322.9
  • Araneism 989.5
  • Arboencephalitis, Australian 062.4
  • Arbor virus, arbovirus (infection) NEC 066.9
  • Arborization block (heart) 426.6
  • ARC 042
  • Arc-welders' lung 503
  • Arc-welders' syndrome (photokeratitis) 370.24
  • Arcadiacus amorphus 759.89
  • Arches - see condition
  • Arcuate uterus 752.36
  • Arcuatus uterus 752.36
  • Arcus (cornea)