{"id":"g6pd","name":"G6PD (Glucose-6-Phosphate Dehydrogenase)","shortName":"G6PD","aliases":["G6PD","Glucose-6-Phosphate Dehydrogenase","G6PD Quantitative","G-6-PD","G6PD, Quant","G6PD Activity","G6PD Screen","G6PD, RBC","Glucosa-6-fosfato deshidrogenasa","G6PD Enzyme Activity","Glucose-6-Phosphate Dehydrogenase, Quantitative","Glucose 6-Phosphate Dehydrogenase Enzyme Activity, Blood","G6PD Erythrocytes","RBC G6PD test","G6PD Quantitative, Blood","G6PDH","Glucose-6-Phosphate Dehydrogenase (G6PD)","G-6-PD Quantitative"],"abbreviations":["G6PD","G-6-PD","G6PDH"],"loinc":[{"code":"32546-4","primary":true},{"code":"2357-2","primary":false},{"code":"71593-8","primary":false}],"specimen":"whole-blood","units":[{"ucum":"U/g{Hb}","display":"U/g Hb"}],"referenceRanges":[{"population":"18+","low":9.6,"high":16.3,"unit":"U/g{Hb}","unitDisplay":"U/g Hb","note":"ARUP interval for ages 18 and over, both sexes (quantitative enzymatic assay, results normalized to hemoglobin). Intervals depend on each lab's method and test temperature, and ARUP states that its cut-offs cannot be used interchangeably across assays. Other labs print different adult intervals: Mayo Clinic Laboratories (kinetic spectrophotometry) 8.0–11.9 U/g Hb for ages 12 months and older, with no values established below 12 months, and UW Medicine 10.0–14.2 U/g Hb for all ages. For females, ARUP's WHO-based cut-offs call 3.8 to under 10.2 U/g Hb intermediate, so a result between 9.6 and 10.2 can sit inside this interval and still fall in the intermediate category. A test done during or soon after a hemolytic episode, or after a transfusion, can read falsely normal (CPIC 2023, AAFP 2005). Use the range printed on your own report.","sources":[{"title":"Glucose-6-Phosphate Dehydrogenase (test 0080135)","url":"https://ltd.aruplab.com/Tests/Pub/0080135","publisher":"ARUP Laboratories"},{"title":"Glucose 6-Phosphate Dehydrogenase Enzyme Activity, Blood (test G6PD1)","url":"https://www.testcatalog.org/show/G6PD1","publisher":"Mayo Clinic Laboratories"},{"title":"G6PD Quantitative (lab code G6PDR)","url":"https://testguide.labmed.uw.edu/view/G6PDR","publisher":"UW Medicine Laboratory Medicine"},{"title":"Expanded Clinical Pharmacogenetics Implementation Consortium Guideline for Medication Use in the Context of G6PD Genotype","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC10281211/","publisher":"Clinical Pharmacology & Therapeutics","year":2023},{"title":"Diagnosis and management of G6PD deficiency","url":"https://www.aafp.org/pubs/afp/issues/2005/1001/p1277.html","publisher":"American Family Physician","year":2005}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures how active the G6PD enzyme is in your red blood cells. Low activity is called G6PD deficiency.","url":"https://bloodtesttracker.com/markers/g6pd","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}