| G and D | growth and development |
|---|---|
| H and E | hematoxylin and eosin [stain] |
| HAT | Halsted Aphasia Test; head, arm, trunk; heparin-associated thrombocytopenia; heterophil antibody tit... |
| HBsAg/adr | hepatitis B surface antigen manifesting group-specific determinant a and subtype-specific determinan... |
| HEDIS | Health Plan Employer Data and Information Set; health employer data and information set |