| Gene | Description | Location | Gene Omim Number | Disease Omim Number |
| HADHA | HYDROXYACYL-CoA DEHYDROGENASE/3-KETOACYL-CoA THIOLASE/ENOYL-CoA HYDRATASE, ALPHA SUBUNIT; HADHA | 2p23 | 600890 | 600890 |
| HADHB | HYDROXYACYL-CoA DEHYDROGENASE/3-KETOACYL-CoA THIOLASE/ENOYL-CoA HYDRATASE, BETA SUBUNIT; HADHB | 2p23 | 143450 | 143450 |
| HBA1 | HEMOGLOBIN--ALPHA LOCUS 1; HBA1 | 16pter-p13.3 | 141800 | 141800 |
| HBB | HEMOGLOBIN--BETA LOCUS; HBB | 11p15.5 | 141900 | 141900 |
| HD | HUNTINGTON DISEASE; HD | 4p16.3 | 143100 | 143100 |
| HDAC4 | HISTONE DEACETYLASE 4; HDAC4 | 2q37.2 | 605314 | 605314 |
| HEXA | HEXOSAMINIDASE A; HEXA | 15q23-q24 | 606869 | 606869 |
| HFE | HOMEOSTATIC IRON REGULATOR; HFE | 6p22.2 | 613609 | 613609 |
| HGF | HEPATOCYTE GROWTH FACTOR; HGF | 7q21.1 | 142409 | 142409 |
| HIST1H2BJ | HISTONE GENE CLUSTER 1, H2B HISTONE FAMILY, MEMBER J; HIST1H2BJ | 6p22.1 | 615044 | 615044 |
| HLA-B | MAJOR HISTOCOMPATIBILITY COMPLEX, CLASS I, B; HLA-B | 6p21.3 | 142830 | 142830 |
| HMBS | HYDROXYMETHYLBILANE SYNTHASE; HMBS | 11q23.3 | 609806 | 609806 |
| HNF4A | HEPATOCYTE NUCLEAR FACTOR 4-ALPHA; HNF4A | 20q12-q13.1 | 600281 | 600281 |
| HPRT1 | HYPOXANTHINE GUANINE PHOSPHORIBOSYLTRANSFERASE 1; HPRT1 | Xq26-q27.2 | 308000 | 308000 |
| HPS1 | HPS1 BIOGENESIS OF LYSOSOMAL ORGANELLES COMPLEX 3, SUBUNIT 1; HPS1 | 10q23.1 | 604982 | 604982 |
| HSD17B4 | 17-BETA-HYDROXYSTEROID DEHYDROGENASE IV; HSD17B4 | 5q2 | 601860 | 601860 |
| HSPB8 | HEAT-SHOCK 22-KD PROTEIN 8; HSPB8 | 12q24.23 | 608014 | 608014 |