CD 16/56 Test

CD16 and CD56 are proteins found on the surface of natural killer (NK) cells, a type of white blood cell. Natural killer cells are a crucial part of the innate immune system and form the first line of defence against infections and cancer cells.

The CD16/56 test is an immunophenotyping test that identifies, counts, and checks the function of natural killer (NK) cells by detecting CD16 and CD56 surface proteins. It is also known as natural killer cell assay or NK cell assay.

This test helps diagnose and monitor:

• Immune deficiencies involving natural killer cells
• Blood cancers like chronic lymphocytic leukaemia
• Autoimmune disorders like rheumatoid arthritis
• Response to cancer immunotherapy

The CD16/56 assay offered by our diagnostics laboratory includes:

• Sample collection by certified phlebotomist
• Processing at ISO certified facility
• Identification and enumeration of NK cells (CD16+ CD56+ cells)
• Assessment of NK cell cytotoxicity function
• Detailed test report with reference ranges
• Sample pickup from home or visit our collection centres
• Digital report access within 48 hours

Low NK cell count or impaired functioning indicates weakened innate immunity. Timely detection helps monitor disease progression and guides treatment with immunomodulators or antivirals.

To know your NK cell immunity against infections, you can book this test online or via app. Our phlebotomist will collect 2 ml blood sample from your home. The report will be emailed within 48 hours. Please consult your doctor to understand the results and get appropriate treatment if required.