{"id":"reticulocytes-absolute","name":"Reticulocyte Count (Absolute)","shortName":"Retic #","aliases":["Reticulocytes (Absolute)","Reticulocytes #","Retic Count Absolute","Retic Absolute","Absolute Reticulocyte Count","Retic Abs","RET#","ARC","Reticulocyte Count, Absolute","Absolute Retic Count","Reticulocytes, Absolute","Reticulocyte Absolute","Retic Count (Absolute)","Reticulocyte Number","Absolute Reticulocytes","Retics, Absolute","Absolute Retic","Reticulocitos absolutos"],"abbreviations":["RET#","ARC"],"loinc":[{"code":"60474-4","primary":true},{"code":"14196-0","primary":false},{"code":"40665-2","primary":false},{"code":"42758-3","primary":false}],"specimen":"whole-blood","units":[{"ucum":"10*3/uL","display":"×10³/µL"},{"ucum":"10*9/L","display":"×10⁹/L"},{"ucum":"10*6/uL","display":"×10⁶/µL"},{"ucum":"/uL","display":"cells/µL"}],"referenceRanges":[{"population":"18+","low":30.4,"high":110.9,"unit":"10*3/uL","unitDisplay":"×10³/µL","note":"Mayo Clinic Laboratories prints 30.4–110.9 ×10⁹/L for adults (flow cytometry); ×10⁹/L and ×10³/µL are the same number. Other labs: Vanderbilt (Sysmex) 20–100 ×10³/µL, printed as 0.02–0.100 ×10⁶/µL; Waikato 10–100 ×10⁹/L (age 16 and over); QEHB 46–105 ×10⁹/L for men and 33–102 for women; HNL Lab Medicine 18.8–108.6 ×10³/µL for men and 23.0–93.5 for women, printed as 0.0188–0.1086 and 0.0230–0.0935 ×10⁶/µL. Healthy Russian adults with a BMI under 28 on Beckman Coulter analyzers had 23.0–84.1 ×10⁹/L. Labs that split by sex give women a lower upper limit. Use the range printed on your own report, and check the unit: the same result can print as 50, 0.05 or 50,000.","sources":[{"title":"Reticulocyte Profile, Blood (test RETB)","url":"https://www.testcatalog.org/show/RETB","publisher":"Mayo Clinic Laboratories (catalog mirror at testcatalog.org)"},{"title":"Sysmex Complete Blood Count Reference Ranges (March 2024)","url":"https://www.testmenu.com/vanderbiltmedicallabs/TestDirectory/SiteFile?fileName=sidebar%5CVML%20Operations%20Sysmex%20Complete%20Blood%20Count%20Reference%20Ranges.pdf","publisher":"Vanderbilt Medical Laboratories","year":2024},{"title":"CBC reference intervals (HEM-2597.01)","url":"https://lab.waikatodhb.health.nz/assets/test-attachments/230/CBC-reference-intervals.pdf","publisher":"Te Whatu Ora Health New Zealand, Waikato","year":2024},{"title":"Haematology Adult Reference Ranges (HAE.N002, PUB_040)","url":"https://qehbpathology.uk/images/files/PUB_040.pdf","publisher":"QEHB Pathology","year":2026},{"title":"Hematology Reference Intervals (updated April 2026)","url":"https://www.hnl.com/HNL/media/Resources/TestDirectory/HNLLabMedicine_1364_HematologyReferenceRange-Intervals_24.pdf","publisher":"HNL Lab Medicine","year":2026},{"title":"Derivation of Russian-specific reference intervals for complete blood count, iron markers and related vitamins","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC11441669/","publisher":"PLoS One","year":2024}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The number of reticulocytes (very young red blood cells) in a set amount of blood. It shows how many new red cells your bone marrow is releasing.","url":"https://bloodtesttracker.com/markers/reticulocytes-absolute","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}