- Hyperthymergasia (see also Psychosis, affective) 296.0
- Hyperthymism 254.8
- Hyperthyroid (recurrent) - see Hyperthyroidism
- Hyperthyroidism (latent) (preadult) (recurrent) (without goiter) 242.9
- Hypertonia - see Hypertonicity
- Hypertonicity
- Hypertony - see Hypertonicity
- Hypertransaminemia 790.4
- Hypertrichosis 704.1
- Hypertriglyceridemia, essential 272.1
- Hypertrophy, hypertrophic
- Hypertropia (intermittent) (periodic) 378.31
- Hypertyrosinemia 270.2
- Hyperuricemia 790.6
- Hypervalinemia 270.3
- Hyperventilation (tetany) 786.01
- Hyperviscidosis 277.00
- Hyperviscosity (of serum) (syndrome) NEC 273.3
- Hypervitaminosis (dietary) NEC 278.8
- Hypervolemia 276.6
- Hypesthesia (see also Disturbance, sensation) 782.0
- Hyphema (anterior chamber) (ciliary body) (iris) 364.41
