| IAD | inactivating dose; instructional advance directive; internal absorbed dose |
|---|---|
| IADH | inappropriate antidiuretic hormone |
| IADHS | inappropriate antidiuretic hormone syndrome |
| IADL | instrumental or intermediate activities of daily living |
| IADR | International Association for Dental Research |
| IAds | immunoadsorption |
| IADSA | intra-arterial digital subtraction angiography |