| Abbreviation | Definition |
|---|---|
| IFL | Integrated Forensic Laboratories |
| IFOB | Immunoassay Fecal Occult Blood |
| IFT | ImmunoFluorescence Test |
| IG | Immune globulin |
| IG | ImmunoGlobulin |
| IgA | immunoglobulin A |
| IGD | Inserted Globular Domain |
| IgE | Immunoglobulin E |
| IGH | increased glycated hemoglobin |
| IGL | International Gemological Laboratories |
| IGL | International Gemological Laboratory |
| IGM | Immune globulin |
| IHAL | Industrial Hygiene Analytical Laboratory |
| IHC | ImmunoHistoChemistry |
| IHS | In House Specification |
| IIB | Instituto de Investigaciones Biomédicas |
| IITR | Indian Institute of Toxicology Research |
| IJLM | Internet Journal of Laboratory Medicine |
| IJML | International Journal of Medical Laboratory |
| ILAC | International Laboratory Accreditation & Certification |