| IMIA | International Medical Informatics Association |
|---|---|
| INA | infectious nucleic acid; inferior nasal artery; International Neurological Association |
| IOA | inner optic anlage; International Osteopathic Association |
| IPAA | International Psychoanalytical Association |
| IPITA | International Pancreas and Islet Transplant Association |
| ICHPPC | International Classification of Health Problems in Primary Care |
|---|---|
| ICIDH | International Classification of Impairments Disabilities and Handicaps |
| I.C.P.C. | International Classification of Primary Care |
| ICSD | International Classification of Sleep Disorders |
| ICRU | International Commission of Radiation Units and Measurements |