| NOPHN | National Organization for Public Health Nursing |
|---|---|
| PH | parathyroid hormone; partial hepatectomy; partial hysterectomy; passive hemagglutination; past histo... |
| PHA | passive hemagglutination [test]; peripheral hyperalimentation; phenylalanine; phytohemagglutinin; ph... |
| PHLS | Public Health Laboratory Service |
| PHS | Physicians' Health Study; pooled human serum; posthypnotic suggestion; Public Health Service |