| Abbreviation | Definition |
|---|---|
| IMM | Immobilize |
| IMM | Immunize |
| ImM | Immunoglobulin M |
| IMN | Infectious MonoNucleosis |
| IMO | Intravenous Membrane Oxygenator |
| IMP | Implant |
| IMP | Impression |
| IMP | Improved |
| IMR | Infant Mortality Rate |
| IMRT | Intensity Modulated Radiation Therapy |
| IMS | InterMuscular Stimulation |
| IMT | Integrative Manual Therapy |
| IMT | Intimal-Medial Thickness |
| IMV | Inoue-Melnick virus |
| IMV | Intermittent Mandatory Ventilation |
| IMVC | Isometric Maximum Voluntary Contraction |
| INAH | Interstitial Nuclei of the Anterior Hypothalamus |
| INC | Incomplete |
| INC | Inconclusive |
| INC | Increase |