- Hb (abnormal)
- Head - see also condition
- Headache 784.0
- Health
- Healthy
- Hearing examination V72.1
- Heart - see condition
- Heartburn 787.1
- Heat (effects) 992.9
- Heavy-chain disease 273.2
- Heavy-for-dates (fetus or infant) 766.1
- Hebephrenia, hebephrenic (acute) (see also Schizophrenia) 295.1
- Heberden's
- Hebra's disease
- Hebra, nose 040.1
- Hedinger's syndrome (malignant carcinoid) 259.2
- Heel - see condition
- Heerfordt's disease or syndrome (uveoparotitis) 135
- Hegglin's anomaly or syndrome 288.2
- Heidenhain's disease 290.10
- Heilmeyer-Schoner disease (M9842/3) 207.1
- Heine-Medin disease (see also Poliomyelitis) 045.9