• Antrum, antral - see condition
  • Anuria 788.5
  • Anus, anal - see also condition
  • Anusitis 569.49
  • Anxiety (neurosis) (reaction) (state) 300.00
  • Aorta, aortic - see condition
  • Aortectasia 441.9
  • Aortitis (nonsyphilitic) 447.6
  • Apathetic 799.25
  • Apathy 799.25
  • Apepsia 536.8
  • Aperistalsis, esophagus 530.0
  • Apert's syndrome (acrocephalosyndactyly) 755.55
  • Apert-Gallais syndrome (adrenogenital) 255.2
  • Apertognathia 524.20
  • Aphagia 787.20
  • Aphakia (acquired) (bilateral) (postoperative) (unilateral) 379.31
  • Aphalangia (congenital) 755.4
  • Aphasia (amnestic) (ataxic) (auditory) (Broca's) (choreatic) (classic) (expressive) (global) (ideational) (ideokinetic) (ideomotor) (jargon) (motor) (nominal) (receptive) (semantic) (sensory) (syntactic) (verbal) (visual) (Wernicke's) 784.3
  • Aphemia 784.3
  • Aphonia 784.41
  • Aphthae, aphthous - see also condition