{"id":"ldh","name":"Lactate Dehydrogenase (LDH)","shortName":"LDH","aliases":["Lactate Dehydrogenase","LDH","LD","LDH, Total","Lactic Dehydrogenase","LD, Total","Lactic Acid Dehydrogenase","LDH, Serum","Lactate Dehydrogenase, Serum or Plasma","Lactate Dehydrogenase (LDH)","LDH Level","LD (Lactate Dehydrogenase)","LDH (Lactate Dehydrogenase)","LD Total","LDH Total"],"abbreviations":["LDH","LD"],"loinc":[{"code":"2532-0","primary":true},{"code":"14804-9","primary":false},{"code":"14805-6","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"U/L","display":"U/L"},{"ucum":"ukat/L","display":"µkat/L"},{"ucum":"nkat/L","display":"nkat/L"}],"referenceRanges":[{"population":"Men, 18+","low":121,"high":224,"unit":"U/L","unitDisplay":"U/L","note":"Labcorp's interval for men over 17 (IU/L). Other sources differ: MedlinePlus gives 125–220 IU/L, ABIM (January 2026) gives 80–225 U/L, and ARUP prints 'by report'. LDH ranges depend on the method and the lab, so use the interval printed on your own report.","sources":[{"title":"Pediatric Testing Reference Ranges (LDH, test 001115, ages 0 to over 17)","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp"},{"title":"LDH (test 001115) sample report","url":"https://files.labcorp.com/testmenu-d8/sample_reports/001115.pdf","publisher":"Labcorp"}]},{"population":"Women, 18+","low":119,"high":226,"unit":"U/L","unitDisplay":"U/L","note":"Labcorp's interval for women over 17 (IU/L). It is almost the same as the men's interval. Other labs use different limits, so use the interval printed on your own report.","sources":[{"title":"Pediatric Testing Reference Ranges (LDH, test 001115, ages 0 to over 17)","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp"}]},{"population":"18+","low":125,"high":220,"unit":"U/L","unitDisplay":"U/L","note":"A general adult interval from MedlinePlus (125–220 IU/L), used when sex is not known. Labcorp splits adults by sex (121–224 for men, 119–226 for women), ABIM gives 80–225 U/L, and ARUP prints 'by report'. Use the interval printed on your own report.","sources":[{"title":"Lactate dehydrogenase test","url":"https://medlineplus.gov/ency/article/003471.htm","publisher":"MedlinePlus (National Library of Medicine)","year":2026}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"An enzyme found in almost every tissue. A higher level can be a general sign of cell or tissue damage, and it does not point to one condition.","url":"https://bloodtesttracker.com/markers/ldh","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}