| HAA | hearing aid amplifier; hemolytic anemia antigen; hepatitis-associated antigen; hospital activity ana... |
|---|---|
| HHA | health hazard appraisal; hereditary hemolytic anemia; home health agency; home health aid; hypothala... |
| HNSHA | hereditary nonspherocytic hemolytic anemia |
| HPCHA | high red-cell phosphatidylcholine hemolylic anemia |
| HSA | Hazardous Substances Act; Health Services Administration; health systems agency; hereditary siderobl... |