| Abbreviation | Definition |
|---|---|
| IAFI | Intrapartum Amniotic Fluid Index |
| IAPA | Indian Association of Physician Assistants |
| IAS | Inter-Atrial Septum |
| IASTM | Instrument Assisted Soft Tissue Mobilization |
| IAT | Intracarotid Amobarbital Test |
| IB | Inflammatory Bowel |
| IB | Internal Bleeding |
| IBAT | Interscapular Brown Adipose Tissue |
| IBD | Inclusion Body Disease |
| IBD | Infectious Bursal Disease |
| IBD | Inflammatory Bowel Disease |
| IBF | Immature Brown Fat cell |
| IBM | Inclusion Body Myositis |
| IBMI | Ideal Body Mass Index |
| IBO | Internal Body Organs |
| IBS | Irritable Bowel Syndrome |
| IBS | Irritable Brain Symptom |
| IBSS | International Breast Shape Standard |
| IBW | Ideal body weight |
| IC | Between Meals |