Test guide
Reticulocyte Count
A reticulocyte count (retic count) measures the number of reticulocytes in your blood. Reticulocytes are immature (still developing) red blood cells (RBCs). Your body makes reticulocytes in your bone marrow. Then it sends them into your blood, where they mature into red blood cells within one to two days. The main job of the red blood cells is to move oxygen from your lungs to every cell in your body.
What it is for
A reticulocyte count is most often used to: Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also known as
- retic count, reticulocyte percent, reticulocyte index, corrected reticulocyte, reticulocyte production index, RPI
Reviewed products
Curated product links for this test are still under editorial review. Meanwhile, browse the product directory or request a supplier match below.