| FWPCA | Federal Water Pollution Control Administration |
|---|---|
| HA | H antigen; Hakim-Adams [syndrome]; halothane anesthesia; Hartley [guinea pig]; headache; health alli... |
| HAD | health care alternatives development; hemadsorption; hospital administration, hospital administrator... |
| HCFA | Health Care Financing Administration (pronounced Hickfa) |
| HCPCS | Health Care Financing Administration common procedural collecting system; Health Care Financing Admi... |