The IMR provides diagnostic services of specialized tests to various hospitals and clinics. It also serves as national referral centres in various specialized fields.

Diagnostic services provided by the Institute are further illustrated as follows:

- Allergy and Immunology Research Centre ( AIRC )

- Cancer Research Centre ( CaRC )

- Haematology Unit

- Molecular Pathology Unit

- Stomatology Unit

- Cardiovascular, Diabetes, Nutrition Research Centre ( CDNRC )

- Cardiovascular Unit

- Diabetes & Metabolic Disorders Unit

- Nutrition Unit

- Environmental Health Research Centre ( EHRC )

- Herbal Medicine Research Centre ( HMRC )

- Information Unit

- Bioassay Unit

- Toxicology & Pharmacology Unit

- Phytochemistry Unit

- Infectious Diseases Research Centre ( IDRC )

- Acarology Unit

- Bacteriology Unit

- Entomology Unit

- Parasitology Unit

- Virology Unit

- Medical Research Resource Centre ( MRRC )

- Epidemiology & Biostatistics Unit

- Biotechnology Unit

- Information Technology Unit

- Electron Microscopy Unit

- Laboratory Animal Resource Unit

- Library & Information Resource Unit

- Medical Photography & Audio Visual Unit

- Biomedical Museum

- Specialized Diagnostics Centre ( SDC )

- Biochemistry Unit

- Molecular Diagnostics and Protein Unit