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Understand Lymphocyte-to-Monocyte Ratio (LMR)

Lymphocyte-to-Monocyte Ratio (LMR)

Immunity & allergy markers

What the test generally measures, and what to ask about it.

Longetic keeps every lab and record you’ve had organized and easy to find, so your own Lymphocyte-to-Monocyte Ratio (LMR) values sit together on one chart and you walk into your next appointment prepared.

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Updated Jul 13, 2026

What is Lymphocyte-to-Monocyte Ratio (LMR)?

A calculated ratio comparing two white-blood-cell types - lymphocytes and monocytes - as a general marker of immune balance.

This is a calculated value from a routine complete blood count (CBC): it divides your lymphocyte count by your monocyte count. A lower LMR can be associated with more systemic inflammation and, in research, less favorable outcomes, a higher LMR can be associated with a more balanced immune state. It is a general, non-specific signal rather than a diagnosis.

This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Terms of Use.

References

Official source "CBC-derived inflammatory ratios (Gasparyan, Ann Lab Med 2019)" PubMed. pubmed.ncbi.nlm.nih.gov/30809980.

About our sources

Clinical / professional

Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.

Peer-reviewed research

Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.

History of updates

Published · Jul 13, 2026
First published, calculated index, formula + sources independently fact-checked.

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