| IPB | injury-prone behavior; integrated problem-based curriculum |
|---|---|
| IPPR | integrated pancreatic polypeptide response; intermittent positive-pressure respiration |
| IRIS | integrated risk information system; interleukin regulation of immune system; International Research ... |
| IRTIS | Integrated Radiation Therapy Information System |
| ISDN | integrated services digital network; isosorbide dinitrate |