| Db | Link | Name | Definition | Comment | Is a |
|---|---|---|---|---|---|
| OMIM | OMIM:126600 | DOYNE HONEYCOMB RETINAL DYSTROPHY; DHRD | — | — | — |
| OMIM | OMIM:126700 | BASAL LAMINAR DRUSEN | — | — | — |
| OMIM | OMIM:126800 | DUANE RETRACTION SYNDROME 1; DURS1 | — | — | — |
| OMIM | OMIM:126830 | MOVED TO 169100 | — | — | — |
| OMIM | OMIM:126840 | DUODENAL ULCER DUE TO ANTRAL G-CELL HYPERFUNCTION | — | — | — |
| OMIM | OMIM:126850 | DUODENAL ULCER, HYPERPEPSINOGENEMIC I | — | — | — |
| OMIM | OMIM:126900 | DUPUYTREN CONTRACTURE | — | — | — |
| OMIM | OMIM:126950 | DWARFISM WITH TALL VERTEBRAE | — | — | — |
| OMIM | OMIM:127000 | KENNY-CAFFEY SYNDROME, TYPE 2; KCS2 | — | — | — |
| OMIM | OMIM:127100 | DWARFISM, LEVI TYPE | — | — | — |
| OMIM | OMIM:127200 | DWARFISM WITH STIFF JOINTS AND OCULAR ABNORMALITIES | — | — | — |
| OMIM | OMIM:127300 | LERI-WEILL DYSCHONDROSTEOSIS; LWD | — | — | — |
| OMIM | OMIM:127350 | DYSCHONDROSTEOSIS AND NEPHRITIS | — | — | — |
| OMIM | OMIM:127400 | DYSCHROMATOSIS SYMMETRICA HEREDITARIA; DSH | — | — | — |
| OMIM | OMIM:127500 | DYSCHROMATOSIS UNIVERSALIS HEREDITARIA 1; DUH1 | — | — | — |
| OMIM | OMIM:127550 | DYSKERATOSIS CONGENITA, AUTOSOMAL DOMINANT 1; DKCA1 | — | — | — |
| OMIM | OMIM:127600 | DYSKERATOSIS, HEREDITARY BENIGN INTRAEPITHELIAL; HBID | — | — | — |
| OMIM | OMIM:127700 | DYSLEXIA, SUSCEPTIBILITY TO, 1; DYX1 | — | — | — |
| OMIM | OMIM:127750 | DEMENTIA, LEWY BODY; DLB | — | — | — |
| OMIM | OMIM:127800 | DYSPLASIA EPIPHYSEALIS HEMIMELICA | — | — | — |
| OMIM | OMIM:127820 | DYSPLASIA EPIPHYSEALIS HEMIMELICA WITH CHONDROMAS AND OSTEOCHONDROMAS | — | — | — |
| OMIM | OMIM:128000 | DYSTELEPHALANGY | — | — | — |
| OMIM | OMIM:128100 | DYSTONIA 1, TORSION, AUTOSOMAL DOMINANT; DYT1 | — | — | — |
| OMIM | OMIM:128101 | DYSTONIA 4, TORSION, AUTOSOMAL DOMINANT; DYT4 | — | — | — |
| OMIM | OMIM:128200 | EPISODIC KINESIGENIC DYSKINESIA 1; EKD1 | — | — | — |