{"id":"alp","name":"Alkaline Phosphatase (ALP)","shortName":"ALP","aliases":["Alkaline Phosphatase","ALP","Alk Phos","Alkaline Phosphatase, Serum","Alk Phosphatase","ALKP","Alk Phos Total","Alkaline Phos","Alkaline Phosphatase, Total","Alkaline Phosphatase, S","Alk. Phos.","Phosphatase, Alkaline","Phosphatase alcaline","Fosfatasa alcalina","Alkalische Phosphatase","Fosfatasi alcalina","Fosfatase alcalina"],"abbreviations":["ALP","ALK PHOS","ALKP"],"loinc":[{"code":"6768-6","primary":true},{"code":"77141-0","primary":false},{"code":"1783-0","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"U/L","display":"U/L"},{"ucum":"ukat/L","display":"µkat/L"}],"referenceRanges":[{"population":"Men, 19+","low":40,"high":129,"unit":"U/L","unitDisplay":"U/L","note":"Mayo Clinic Laboratories prints 40–129 U/L for men 19 and older. Labcorp's 2022 reference-range guide gives 44–121 IU/L for all adults over 20, and its test page lists sex- and age-specific adult intervals instead (for example 47–123 for men 21 to 50). The American Board of Internal Medicine's reference list gives 30–120 U/L. Intervals differ by lab and method, so use the range printed on your own report first.","sources":[{"title":"Alkaline Phosphatase, Total and Isoenzymes, Serum (test ID ALKP)","url":"https://www.testcatalog.org/show/ALKP","publisher":"Mayo Clinic Laboratories"},{"title":"Comprehensive Metabolic Panel, Serum (test ID CMAMA)","url":"https://www.testcatalog.org/show/CMAMA","publisher":"Mayo Clinic Laboratories"},{"title":"Alkaline Phosphatase (test 001107)","url":"https://www.labcorp.com/tests/001107/alkaline-phosphatase","publisher":"Labcorp"},{"title":"Pediatric Testing Reference Ranges","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp","year":2022},{"title":"ABIM Laboratory Test Reference Ranges (January 2026)","url":"https://www.abim.org/Media/bfijryql/laboratory-reference-ranges.pdf","publisher":"American Board of Internal Medicine","year":2026}]},{"population":"Women, 17+","low":35,"high":104,"unit":"U/L","unitDisplay":"U/L","note":"Mayo Clinic Laboratories prints 35–104 U/L for women 17 and older. Labcorp prints 44–121 IU/L for all adults over 20, and its test page lists 41–116 for women 21 to 50 and 49–135 for women 51 to 80. A separate Mayo liver-panel listing shows ALP in women stepping up with age, from 37–98 U/L at ages 24 to 45 to 55–142 U/L at 66 and older, so levels tend to be higher in older women. Intervals differ by lab and method, so use the range printed on your own report first.","sources":[{"title":"Alkaline Phosphatase, Total and Isoenzymes, Serum (test ID ALKP)","url":"https://www.testcatalog.org/show/ALKP","publisher":"Mayo Clinic Laboratories"},{"title":"Comprehensive Metabolic Panel, Serum (test ID CMAMA)","url":"https://www.testcatalog.org/show/CMAMA","publisher":"Mayo Clinic Laboratories"},{"title":"Liver Profile, Serum (test ID LIVPR)","url":"https://www.testcatalog.org/show/LIVPR","publisher":"Mayo Clinic Laboratories"},{"title":"Alkaline Phosphatase (test 001107)","url":"https://www.labcorp.com/tests/001107/alkaline-phosphatase","publisher":"Labcorp"},{"title":"Pediatric Testing Reference Ranges","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp","year":2022},{"title":"ABIM Laboratory Test Reference Ranges (January 2026)","url":"https://www.abim.org/Media/bfijryql/laboratory-reference-ranges.pdf","publisher":"American Board of Internal Medicine","year":2026}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"An enzyme made mostly in your liver, bile ducts and bones. Its blood level gives clues about those tissues.","url":"https://bloodtesttracker.com/markers/alp","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}