• Ankylodactly (see also Syndactylism) 755.10
  • Ankyloglossia 750.0
  • Ankylosis (fibrous) (osseous) 718.50
  • Ankylostoma - see Ancylostoma
  • Ankylostomiasis (intestinal) - see Ancylostomiasis
  • Ankylurethria (see also Stricture, urethra) 598.9
  • Annular - see also condition
  • Anodontia (complete) (partial) (vera) 520.0
  • Anomaly, anomalous (congenital) (unspecified type) 759.9
  • Anomia 784.69
  • Anonychia 757.5
  • Anophthalmos, anophthalmus (clinical) (congenital) (globe) 743.00
  • Anopsia (altitudinal) (quadrant) 368.46
  • Anorchia 752.89
  • Anorchism, anorchidism 752.89
  • Anorexia 783.0
  • Anosmia (see also Disturbance, sensation) 781.1
  • Anosognosia 780.99
  • Anosphrasia 781.1
  • Anosteoplasia 756.50
  • Anotia 744.09
  • Anovulatory cycle 628.0