| I:E | Inspiratory To Expiratory Ratio | - | Medical(slang) |
| IABP | Intra-Aortic Balloon Pump | - | Medical(slang) |
| IBC | Iron Binding Capacity | - | Medical(slang) |
| IBD | Inflammatory Bowel Disease | - | Medical(slang) |
| IBS | Irritable Bowel Syndrome | - | Medical(slang) |
| IBW | Ideal Body Weight | - | Medical(slang) |
| ICCE | Intracapsular Cataract Extraction | - | Medical(slang) |
| ICF | Intermediate Care Facility | - | Medical(slang) |
| ICF | Imtermediate Care Facility | - | Medical(slang) |
| ICP | Intracranial Pressure | - | Medical(slang) |
| ICS | Intercostal Space | - | Medical(slang) |
| ICT | Inflammation Of Connective Tissue | - | Medical(slang) |
| ICT | Inflammation Of Connective Tissue | - | Medical(slang) |
| ICU | Intensive Care Unit | - | Medical(slang) |
| IDDM | Insulin Dependent Diabetes Mellitus | - | Medical(slang) |
| IDM | Infant Of Diabetic Mother | - | Medical(slang) |
| IE | Inspiratory Exerciser | - | Medical(slang) |
| IH | Infectious Hepatitis | - | Medical(slang) |
| IHD | Ischemic Heart Disease | - | Medical(slang) |
| IIP | Implantable Insulin Pump | - | Medical(slang) |
| IM | Intramuscular | - | Medical(slang) |
| IMV | Intermittent Mandatory Ventilation | - | Medical(slang) |
| INR | International Normalization Ratio | - | Medical(slang) |
| INR | International Normalization Ratio | - | Medical(slang) |
| IOF | International Operation Forces | - | Medical(slang) |
| IPAP | Inspiratory Positive Airway Pressure | - | Medical(slang) |
| IPD | Intermittent Peritoneal Dialysis | - | Medical(slang) |
| IPPB | Intermittent Positive Pressure Breathing | - | Medical(slang) |
| IPPV | Intermittent Positive Pressure Ventilation | - | Medical(slang) |
| ITP | Immune Thrombocytopenic Purpura | - | Medical(slang) |
| IUD | IntraUterine Device | - | Medical(slang) |
| IV | Intravenous | - | Medical(slang) |
| IVDA | IV Drug Abuse/Abuser | - | Medical(slang) |
| IVF | In Vitro Fertilization | - | Medical(slang) |
| IVF | In Vitro Fertilization | - | Medical(slang) |
| IVP | Intravenous Pyelography | - | Medical(slang) |
