| IHSA | iodinated human serum albumin |
|---|---|
| IRSA | idiopathic refractory sideroblastic anemia; iodinated rat serum albumin |
| IS | ileal segment; immediate sensitivity; immune serum; immunosuppression; impingement syndrome; incenti... |
| ISA | Instrument Society of America; intracarotid sodium amytal; intrinsic simulating activity; intrinsic ... |
| ISG | immune serum globulin |