| IHHS | idiopathic hyperkinetic heart syndrome |
|---|---|
| IHO | idiopathic hypertrophic osteo-arthropathy |
| IHS | idiopathic hypereosinophilic syndrome; inactivated horse serum; Indian Health Service; integrated he... |
| IHSS | idiopathic hypertrophic subaortic stenosis |
| IIE | idiopathic ineffective erythropoiesis |