- Acapnia 276.3
- Acarbia 276.2
- Acardia 759.89
- Acardiotrophia 429.1
- Acardius 759.89
- Acariasis 133.9
- Acaridiasis 133.9
- Acarinosis 133.9
- Acariosis 133.9
- Acarodermatitis 133.9
- Acarophobia 300.29
- Acatalasemia 277.89
- Acatalasia 277.89
- Acatamathesia 784.69
- Acataphasia 784.59
- Acathisia 781.0
- Acceleration, accelerated
- Accessory (congenital)
- Accident, accidental - see also condition
- Accommodation
- Accouchement - see Delivery
- Accreta placenta (without hemorrhage) 667.0