- Hyphemia - see Hyphema
- Hypo-ovarianism 256.39
- Hypo-ovarism 256.39
- Hypo-TBG-nemia 246.8
- Hypoacidity, gastric 536.8
- Hypoactive labyrinth (function) - see Hypofunction, labyrinth
- Hypoadrenalism 255.4
- Hypoadrenocorticism 255.4
- Hypoalbuminemia 273.8
- Hypoalphalipoproteinemia 272.5
- Hypobarism 993.2
- Hypobaropathy 993.2
- Hypobetalipoproteinemia (familial) 272.5
- Hypocalcemia 275.41
- Hypocalcification, teeth 520.4
- Hypochloremia 276.9
- Hypochlorhydria 536.8
- Hypocholesteremia 272.5
- Hypochondria (reaction) 300.7
- Hypochondriac 300.7
- Hypochondriasis 300.7
- Hypochromasia blood cells 280.9
