{"id":"urine-protein-creatinine-ratio","name":"Urine Protein/Creatinine Ratio (UPCR)","shortName":"UPCR","aliases":["Protein Creatinine Ratio","UPCR","Protein/Creat Ratio, Urine","Urine Protein/Creatinine Ratio","Protein/Creatinine Ratio, Random Urine","Total Protein/Creatinine Ratio, Urine","Total Protein/Creatinine Ratio","Protein/Creatinine Ratio, Random, Urine","Urine Total Protein/Creatinine Ratio","Urine Protein to Creatinine Ratio","Urine Protein-Creatinine Ratio","Spot Urine Protein/Creatinine Ratio","Protein/Creatinine Ratio, Urine"],"abbreviations":["UPCR","Uprot/Cr"],"loinc":[{"code":"2890-2","primary":true},{"code":"34366-5","primary":false}],"specimen":"urine","units":[{"ucum":"mg/g","display":"mg/g"},{"ucum":"mg/mmol","display":"mg/mmol"},{"ucum":"g/g","display":"g/g"},{"ucum":"mg/mg","display":"mg/mg"}],"referenceRanges":[{"population":"18+","low":0,"high":150,"unit":"mg/g","unitDisplay":"mg/g","note":"KDIGO 2012 treats a protein/creatinine ratio below 150 mg/g (below 15 mg/mmol) as normal to mildly increased (category A1). This is a guideline cutoff, not the middle 95% of healthy people. Labs print different cutoffs: Mayo Clinic Laboratories prints below 0.18 mg/mg creatinine (180 mg/g) for adults 18 and older, and ARUP prints 15–68 mg/g for males and 10–107 mg/g for females 18 and older. KDIGO notes that females have lower urine creatinine and so tend to have a higher ratio for the same protein loss. Total protein methods are not standardized across labs, so the range on your own report is the best guide.","sources":[{"title":"KDIGO 2012 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease","url":"https://kdigo.org/wp-content/uploads/2017/02/KDIGO_2012_CKD_GL.pdf","publisher":"Kidney International Supplements 3(1):1-150","year":2013},{"title":"RPTU1 - Protein/Creatinine Ratio, Random, Urine","url":"https://schnecklab.testcatalog.org/show/RPTU1","publisher":"Mayo Clinic Laboratories (via the Schneck Medical Center test catalog)"},{"title":"Protein, Total, Urine (test 0020479)","url":"https://ltd.aruplab.com/Tests/Pub/0020479","publisher":"ARUP Laboratories"}]},{"population":"18+","low":0,"high":15,"unit":"mg/mmol","unitDisplay":"mg/mmol","note":"The same KDIGO category A1 cutoff written in mg/mmol, which is how many labs outside the US report it. KDIGO rounds this to 15 mg/mmol, whereas converting 150 mg/g gives about 17 mg/mmol, so use the row that matches the unit on your report.","sources":[{"title":"KDIGO 2012 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease","url":"https://kdigo.org/wp-content/uploads/2017/02/KDIGO_2012_CKD_GL.pdf","publisher":"Kidney International Supplements 3(1):1-150","year":2013}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Compares the protein in a urine sample with its creatinine to estimate how much protein your kidneys are letting into your urine.","url":"https://bloodtesttracker.com/markers/urine-protein-creatinine-ratio","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}