| Abbreviation | Definition |
|---|---|
| HAART | Highly Active Anti-Retroviral Treatment |
| HAC | Hepatic Arterial Chemotherapy |
| HAGO | Heartland Association of Gynecologic Oncology |
| HARP | Health Assessment and Recovery Program |
| HB | Haemoglobin |
| HBOC | Hereditary Breast and Ovarian Cancer |
| HCC | HepatoCellular Carcinoma |
| HCG | Human Chorionic Gonadotropin |
| HCL | Hairy Cell Leukemia |
| HCO3 | Bicarbonate |
| HCRC | Harvard Cancer Research Center |
| HD | High Dose |
| HD | Hodgkin's Disease (lymphoma) |
| HDC | High Dose Chemotherapy |
| HDM | High-Dose Melphalan |
| HER-2/NEU | Protein related to Cancer |
| HEV | Hepatitis E Virus |
| HF | Hair Follicle |
| HHC | Human Health Carcinogen |
| HIAC | Hepatic Intra-Arterial Chemotherapy |