nRBC
Immature red blood cells released early from bone marrow.
What is it
Nucleated red blood cells are immature cells that should remain in the bone marrow. Their presence in blood reflects stress on the bone marrow.
Why it's measured
Nucleated RBCs in adult blood have been associated with severe illness and bone marrow stress in research literature.
Reference range
Standard laboratory reference
0 cells
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Has been associated with severe anemia, hypoxia, and bone marrow stress in research literature.
Lower
Generally considered favorable.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Reported when present on automated CBC.
Related markers
Common questions
Nucleated red blood cells are immature cells that should remain in the bone marrow. Their presence in blood reflects stress on the bone marrow.
It's one of the markers used to build a fuller picture of your health. On its own it tells you very little, so it's most informative when reviewed alongside related markers.
It's measured from a standard blood draw at Quest or LabCorp. Nucleated RBC Count is one of the markers included in the OPTML Apex Panel, where your results are read across systems and reviewed by a U.S.-licensed physician.
Reference ranges vary by laboratory, and a single value rarely tells the whole story. Review your result with a physician in the context of your other markers, symptoms, and history.
Nucleated RBC Count is one signal among many. Answer a few quick questions and we’ll point you to the panel that fits.
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Find the right panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.
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