Nucleated Red Blood Cells

Nucleated red blood cells are immature red blood cells not normally found in adult blood. Their presence suggests the bone marrow is under stress.

Category: Complete Blood Count

Also known as: nrbc, nucleated rbc, nucleated red blood cells, nrbc %, nucleated red cells, erythroblasts

Reference range: 0–0 % (Source: ABIM)

Standard unit: %

High values may indicate

Presence of NRBCs may indicate severe anemia, bone marrow disorders, leukemia, sepsis, or severe hypoxia.

Low values may indicate

NRBCs are normally absent from adult blood, so a count of zero is expected and healthy.

Source: MedlinePlus, U.S. National Library of Medicine

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