- Hypersomatotropism (classic) 253.0
- Hypersomnia, unspecified 780.54
- Hypersplenia 289.4
- Hypersplenism 289.4
- Hypersteatosis 706.3
- Hyperstimulation, ovarian 256.1
- Hypersuprarenalism 255.3
- Hypersusceptibility - see Allergy
- Hypertelorism 756.0
- Hypertension Table Malignant Benign Unspecified
- Hypertension, hypertensive (arterial) (arteriolar) (crisis) (degeneration) (disease) (essential) (fluctuating) (idiopathic) (intermittent) (labile) (low renin) (orthostatic) (paroxysmal) (primary) (systemic) (uncontrolled) (vascular) 401.0 401.1 401.9
- Hypertensive urgency - see Hypertension
- Hyperthecosis, ovary 256.8
- Hyperthermia (of unknown origin) (see also Pyrexia) 780.60
- 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
