| IAS |
Interatrial septum |
| IBD |
Irritable bowel disease |
| I&D |
Incision and drainage |
| IBS |
Irritable bowel syndrome |
| ICD |
Implantable cardioverterdefibrillator |
| ICP |
Intracranial pressure |
| ICU |
Intensive care unit |
| ID |
Intradermal |
| IDDM |
Insulin-dependent diabetes mellitus |
| Igs |
Immunoglobulins |
| IM |
Intramuscular; infectious mononu cleosis |
| IMP |
Impression (synonymous with diagnosis) |
| INR |
International normalized ratio |
| IVP |
Instravenous pyelogram; intravenous pyelography |
| IOL |
Intraocular lens |
| IOP |
Intraocular pressure |
| IPPB |
Intermittent positive-pressure breathing |
| IRDS |
Infant respiratory distress syndrome |
| IS |
Intracostal space |
| ITP |
Idiopathic thrombocytopenic purpura |
| IU* |
International unit |
| IUD |
Intrauterine device |
| IUGR |
Intrauterine growth rate; intrauterine growth retardation |
| IV |
Intravenous |
| IVC |
Intravenous cholangiogram; intravenous cholangiography |
| IVF |
In vitro fertilization |
| IVF-ET |
In vitro fertilization and embryo transfer |
| IVP |
Intravenous pyelogram; intravenous pyelography |
