- Duane's retraction syndrome 378.71
- Duane-Stilling-Türk syndrome (ocular retraction syndrome) 378.71
- Dubin-Johnson disease or syndrome 277.4
- Dubini's disease (electric chorea) 049.8
- Dubois' abscess or disease 090.5
- Duchenne's
- Duchenne-Aran myelopathic, muscular atrophy (nonprogressive) (progressive) 335.21
- Duchenne-Griesinger disease 359.1
- Ducrey's
- Duct, ductus - see condition
- Duengero 061
- Duhring's disease (dermatitis herpetiformis) 694.0
- Dukes (-Filatov) disease 057.8
- Dullness
- Dumb ague (see also Malaria) 084.6
- Dumbness (see also Aphasia) 784.3
- Dumdum fever 085.0
- Dumping syndrome (postgastrectomy) 564.2
- Duodenitis (nonspecific) (peptic) 535.60
- Duodenocholangitis 575.8
- Duodenum, duodenal - see condition
- Duplay's disease, periarthritis, or syndrome 726.2