{"id":"urine-rbc","name":"Urine Red Blood Cells (RBC)","shortName":"Urine RBC","aliases":["RBC, Urine","Red Blood Cells, Urine","Urine RBC","RBC (UA)","Erythrocytes, Urine","RBC/HPF","RBC, UA","UA RBC","Urine Red Blood Cells (Microscopic)","Urinary RBC","RBC, Urine (per HPF)"],"abbreviations":["U-RBC","RBC/HPF"],"loinc":[{"code":"13945-1","primary":true},{"code":"5808-1","primary":false},{"code":"105107-7","primary":false},{"code":"46419-8","primary":false}],"specimen":"urine","units":[{"ucum":"/[HPF]","display":"/HPF"}],"referenceRanges":[{"population":"18+","low":0,"high":2,"unit":"/[HPF]","unitDisplay":"/HPF","note":"Labcorp prints 0-2 /hpf for RBC on its complete urinalysis (test 003772). This matches the AUA/SUFU (2025) definition of microhematuria as 3 or more red cells per HPF on a single properly collected specimen. Printed intervals differ: Cleveland Clinic lists 0-3/HPF and MedlinePlus says 4 or fewer. Counts also depend on how the lab prepares and counts the sample.","sources":[{"title":"Urinalysis, Complete (test 003772) sample patient report with reference intervals","url":"https://files.labcorp.com/testmenu-d8/sample_reports/003772.pdf","publisher":"Labcorp","year":2026},{"title":"Updates to Microhematuria: AUA/SUFU Guideline (2025)","url":"https://www.auanet.org/guidelines-and-quality/guidelines/microhematuria","publisher":"American Urological Association / Society of Urodynamics, Female Pelvic Medicine & Urogenital Reconstruction","year":2025},{"title":"Office-Based Urinalysis: A Comprehensive Review","url":"https://www.aafp.org/pubs/afp/issues/2022/0700/office-based-urinalysis.html","publisher":"American Family Physician 2022;106(1):27-35B","year":2022},{"title":"Automated urine sediment analyzers underestimate the severity of hematuria in glomerular diseases","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC8546052/","publisher":"Scientific Reports 2021;11:20981","year":2021}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Counts red blood cells in your urine under a microscope or analyzer, per high-power field (HPF). A few can be usual.","url":"https://bloodtesttracker.com/markers/urine-rbc","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}