Disease phenotype | OMIM | Gene symbol (chromosome) protein |
| Hemiplegic migraine, familial | CACNA1A (19p13.2-p13.1) calcium channel, voltage-dependent, P/Q type, alpha 1A subunit | |
| Hemolytic anemia due to PGK deficiency | PGK1 (Xq13) phosphoglycerate kinase 1 | |
| Hereditary bundle branch system defect | SCN5A (3p21) voltage-gated sodium channel type V alpha | |
| Hereditary motor and sensory neuropathy 2A | MFN2 (1p36.22) mitofusin 2 | |
| Hereditary motor and sensory, neuropathy, proximal, type | ? - (3q13.1) | |
| Hereditary motor and sensory, type 1C | LITAF (16p13.3-p12) lipopolysaccharide-induced TNF factor | |
| hereditary sensory and autonomic neuropathy type ib with cough and gastroesophag | ? - (3p24-p22) | |
| Hereditry myopathy with early respiratory failure | TTN (2q31) titin | |
| Hutchinson-Gilford progeria syndrome | LMNA (1q21.2-q21.3) lamin A/C | |
| Hyalin body myopathy | ? - (3p22.2-p21.32) | |
| Hydrocephalus with Hirschspung disease and cleft palate | L1CAM (Xq28) L1 cell adhesion molecule | |
| Hyperckemia, idiopathic | CAV3 (3p25) caveolin 3 | |
| Hyperkalemic periodic paralysis | SCN4A (17q23-q25.3) sodium channel, voltage-gated, type IV, alpha | |
| Hypertriglyceridemia, one form | APOA1 (11q23-q24) apolipoprotein A-I precursor | |
| Hypoalphalipoproteinemia | APOA1 (11q23-q24) apolipoprotein A-I precursor | |
| Hypoglycemia hypoketonic, with deficiency of carnitine palmitoyltransferase II | CPT2 (1p32) carnitine palmitoyltransferase II | |
| Hypokalaemic periodic paralysis, type 1 | CACNA1S (1q32) calcium channel, voltage-dependent, L type, alpha 1S subunit | |
| Hypokalaemic periodic paralysis, type 3 | KCNE3 (11q13-q14) Potassium voltage-gated channel, Isk-related family, member 3 | |
| Hypokalemic periodic paralysis | SCN4A (17q23-q25.3) sodium channel, voltage-gated, type IV, alpha | |
| Hypokalemic periodic paralysis | CACNA1S (1q32) calcium channel, voltage-dependent, L type, alpha 1S subunit | |
| Hypokalemic periodic paralysis type2 | SCN4A (17q23-q25.3) sodium channel, voltage-gated, type IV, alpha |