- Afibrinogenemia 286.3
- African
- After-cataract 366.50
- Aftercare V58.9
- Agalactia 676.4
- Agammaglobulinemia 279.00
- Aganglionosis (bowel) (colon) 751.3
- Age (old) (see also Senile) 797
- Agenesis - see also Absence, by site, congenital
- Ageusia (see also Disturbance, sensation) 781.1
- Aggressive outburst (see also Disturbance, conduct) 312.0
- Aggressiveness 301.3
- Aging skin 701.8
- Agitated - see condition
- Agitation 307.9
- Aglossia (congenital) 750.11
- Aglycogenosis 271.0
- Agnail (finger) (with lymphangitis) 681.02
- Agnosia (body image) (tactile) 784.69
- Agoraphobia 300.22
- Agrammatism 784.69
- Agranulocytopenia (see also Agranulocytosis) 288.09