| Abbreviation | Definition |
|---|---|
| HGB | Hemoglobin |
| HGF | Hepatic Growth Factor |
| HGH | Human Growth Hormone |
| HGPRT | hypoxanthineguanine phosphoribosyl transferase activity |
| HH | Hard of Hearing |
| HH | Has Herpes |
| HH | Head Heavy |
| HH | Hereditary Hemochromatosis |
| HH | Hiatus Hernia |
| HH | Hyperglycemia And Hyperismolar |
| HH | Hypnogogic Hallucinations |
| HHA | Hypothalamus, Hypothesis, and Adrenal |
| HHNS | Hyperglycemic Hyperosmolar Non-ketotic Syndrome |
| HHS | Hyperosmolar Hyperglycemic State |
| HHT | Hereditary Hemorrhagic Telangiectasia |
| HI | Health Information |
| HI | Hearing Impaired |
| HI | Hotel Infulenza |
| HI | Hyperactive Impulsive |
| HI | Hypoxia Ischemia |