Immature granulocytes optimal range and reference range

Compiled by Alina Radu, founder of Sera, from the published sources below · Last reviewed November 9, 2026

Sera's bands for Immature granulocytes:

  • Optimal 0 – 0.6 %; out of range below 0 or above 0.6 %.

Evidence grade: Published reference interval. A band that primarily reflects a published adult laboratory or population reference interval. It is not necessarily applicable to every assay or laboratory.

All units

UnitOptimalSufficientOut of range
%0 – 0.6—below 0 or above 0.6

No separate Sufficient band is currently defined for this marker.

What the evidence says

Two US hospital laboratories print 0 to 0.5 % and 0 to 0.6 %; Sera uses 0.6. There is no low flag, since every interval starts at 0. Labcorp counts metamyelocytes and myelocytes, not band cells or blasts. No NHS trust page with an interval could be found. Infection, inflammation, pregnancy, surgery and steroid treatment raise it. No source supports a narrower optimal range.

Sources

What Immature Granulocytes % measures

Young white blood cells (metamyelocytes and myelocytes) released from the bone marrow before they are fully mature, as a percentage of all white cells.

Normally close to zero. A rise shows the marrow is releasing cells early, most often during infection or inflammation, and also in pregnancy, after surgery and with steroid treatment. A persistent unexplained rise is worth a repeat count. It does not include band cells or blasts.

Related blood cell health markers

See Immature granulocytes in the full list of biomarker ranges

About the author

Alina Radu is the founder of Sera and a software engineer. The idea started with her own Hashimoto's tests, scattered across years without the big picture. She is not a clinician: these ranges are compiled from the published sources linked on each page, with every source named. Alina Radu on LinkedIn

This page is a reference for practitioners, not medical advice. Sera's bands are practitioner targets for structured review, not diagnostic thresholds, and Sera does not diagnose or recommend treatment. Read a result alongside the interval printed by the issuing laboratory and the client's history and symptoms. Range set: Sera Production, version 1.0, last reviewed November 9, 2026.