- Dandy-Walker deformity or syndrome (atresia, foramen of Magendie) 742.3
- Dangle foot 736.79
- Danielssen's disease (anesthetic leprosy) 030.1
- Danlos' syndrome 756.83
- Darier's disease (congenital) (keratosis follicularis) 757.39
- Darier-Roussy sarcoid 135
- Darling's
- Dartre 054.9
- Darwin's tubercle 744.29
- Davidson's anemia (refractory) 284.9
- Davies' disease 425.0
- Davies-Colley syndrome (slipping rib) 733.99
- Dawson's encephalitis 046.2
- Day blindness (see also Blindness, day) 368.60
- de Beurmann-Gougerot disease (sporotrichosis) 117.1
- de Lange's syndrome (Amsterdam dwarf, mental retardation, and brachycephaly) 759.89
- de Morgan's spots (senile angiomas) 448.1
- de Quervain's
- de Toni-Fanconi syndrome (cystinosis) 270.0
- Dead
- Deaf and dumb NEC 389.7
- Deaf mutism (acquired) (congenital) NEC 389.7