- Hyperkalemia 276.7
- Hyperkeratosis (see also Keratosis) 701.1
- Hyperkinesia, hyperkinetic (disease) (reaction) (syndrome) 314.9
- Hyperlacrimation (see also Epiphora) 375.20
- Hyperlipemia (see also Hyperlipidemia) 272.4
- Hyperlipidemia 272.4
- Hyperlipidosis 272.7
- Hyperlipoproteinemia (acquired) (essential) (familial) (hereditary) (primary) (secondary) 272.4
- Hyperlucent lung, unilateral 492.8
- Hyperluteinization 256.1
- Hyperlysinemia 270.7
- Hypermagnesemia 275.2
- Hypermaturity (fetus or newborn)
- Hypermenorrhea 626.2
- Hypermetabolism 794.7
- Hypermethioninemia 270.4
- Hypermetropia (congenital) 367.0
- Hypermobility
- Hypermotility
- Hypernasality 784.49
- Hypernatremia 276.0
- Hypernephroma (M8312/3) 189.0