| Abbreviation | Definition |
|---|---|
| IPNG | InterPositional Nerve Graft |
| IPP&A | Inspection, Percussion, Palpation, And Auscultation |
| IPPA | Inspection, Palpation, Percussion, Auscultation |
| IPPB | Intermittent Positive Pressure Breathing |
| IPPO | Intermittent Positive-Pressure inflation with Oxygen |
| IPPR | Intermittent Positive Pressure Respiration |
| IPPV | Intermittent Positive Pressure Ventilation |
| iPS | induced pluripotent stem (cells) |
| IPV | Inactivated Poliomyelitis Vaccine |
| IPV | Intrapulmonary Percussive Ventilation |
| IPVD | IntraPulmonary Vascular Dilatation |
| IPVL | Inner PeriVitelline Layer |
| IPVN | IntraParaVentricular Nucleus administration |
| IPW | Independent Physicians of Wisconsin |
| IQ | Intelligence Quotient |
| IQF | Individual Quick Freezing |
| IR | Inferior Rectus |
| IR | Insulin Resistance |
| IR | Internal Rotation |
| IRB | Institutional Review Board (approves research protocols at hospitals) |