| Abbreviation | Definition |
|---|---|
| PHIT | Public Health Intelligence Team |
| PHL | permanent hearing loss |
| PHL | Public Health Laboratory |
| PHPU | Public Health Policy Unit |
| PHRU | Public Health Resource Unit |
| PHSO | Parliamentary and Health Service Ombudsman |
| PHSS | Personal Health Summary System |
| PHSS | This term got 31 hits on 23.10.2011, and is thus assumed to have been retired from active use. |
| PI | pain intensity |
| PI | pancreatic insufficiency |
| PI | parallel imports |
| PI | pars intermedia |
| PI | Pearl Index |
| PI | perfusion imaging |
| PI | peripheral iridectomy |
| PI | phosphatidyl inositol |
| PI | physically impaired |
| PI | physiologic index |
| PI | pituitary |
| PI | plaque inhibition |