- Hydroxyprolinuria 270.8
- Hygroma (congenital) (cystic) (M9173/0) 228.1
- Hymen - see condition
- Hymenolepiasis (diminuta) (infection) (infestation) (nana) 123.6
- Hymenolepsis (diminuta) (infection) (infestation) (nana) 123.6
- Hypalgesia (see also Disturbance, sensation) 782.0
- Hyper-TBG-nemia 246.8
- Hyperabduction syndrome 447.8
- Hyperacidity, gastric 536.8
- Hyperactive, hyperactivity 314.01
- Hyperacusis 388.42
- Hyperadrenalism (cortical) 255.3
- Hyperadrenocorticism 255.3
- Hyperaffectivity 301.11
- Hyperaldosteronism (atypical) (hyperplastic) (normoaldosteronal) (normotensive) (primary) 255.10
- Hyperalgesia (see also Disturbance, sensation) 782.0
- Hyperalimentation 783.6
- Hyperaminoaciduria 270.9
- Hyperammonemia (congenital) 270.6
- Hyperamnesia 780.99
- Hyperamylasemia 790.5
- Hyperaphia 782.0