| Abbreviation | Definition |
|---|---|
| IFR | isoflavone reductase |
| IFRS | International Finance Reporting Standards (!) |
| IG | immature granulocyte |
| IG | immunoglold |
| IG | information governance |
| IG | inspiratory gasp |
| IG | intermediate grade |
| IG | intervention group |
| IG | intragastric |
| IGA | Information Governance Alliance |
| IGS | image-guided surgery |
| IGS | inappropriate gonadotropin secretion |
| IGS | Information Governance Strategy |
| IGSG | Information Governance Steering Group |
| IGSoC | Information Governance Statement of Compliance |
| IGTT | impaired glucose tolerance test |
| IGTT | Information Governance Training Tool |
| IHCAS | Independent Health Complaints Advocacy Service |
| IHCD | Institute of Health and Care Development |
| IHE | infantile haemangioendothelioma |