Print By Mayo Clinic Staff Alkaline phosphatase (ALP) blood test care at Mayo Clinic Request an appointment Care at Mayo Clinic Aug. 05, 2025 Print Show references McPherson RA, et al., eds. Evaluation of liver function. In: Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Elsevier; 2022. https://www.clinicalkey.com. Accessed July 2, 2025. Ferri FF. Laboratory tests and interpretation of results. In: Ferri's Clinical Advisor 2025. Elsevier; 2025. https://www.clinicalkey.com. Accessed July 2, 2025. Alkaline phosphatase (ALP) test. Testing.com. https://www.testing.com/tests/alkaline-phosphatase-alp. Accessed July 2, 2025. Friedman S, et al., eds. Approach to abnormal liver tests. In: Greenberger's Current Diagnosis & Treatment: Gastroenterology, Hepatology, & Endoscopy. 4th ed. McGraw Hill; 2022. https://accessmedicine.mhmedical.com. Accessed July 2, 2025. Alkaline phosphatase, total and isoenzymes, serum. Mayo Clinic Laboratories. https://www.mayocliniclabs.com/test-catalog/overview/622157#Clinical-and-Interpretive. Accessed July 10, 2025. Bone alkaline phosphatase, serum. Mayo Clinic Laboratories. https://www.mayocliniclabs.com/test-catalog/overview/82985#Clinical-and-Interpretive. Accessed July 10, 2025. Dehn R, et al., eds. Venipuncture. In: Essential Clinical Procedures. 4th ed. Elsevier; 2021. https://www.clinicalkey.com. Accessed July 10, 2025. Minisola S, et al. Diagnostic approach to abnormal alkaline phosphatase value. Mayo Clinic Proceedings. 2025; doi:10.1016/j.mayocp.2024.11.019. Youssef EM, et al. Subnormal serum liver enzyme levels: A review of pathophysiology and clinical significance. Journal of Clinical and Translational Hepatology. 2024; doi:10.14218/JCTH.2023.00446. Feldman M, et al., eds. Liver chemistry and function tests. In: Sleisenger and Fordtran's Gastrointestinal and Liver Disease: Pathophysiology, Diagnosis, Management. 11th ed. Elsevier; 2021. https://www.clinicalkey.com. Accessed July 10, 2025. Medical review (expert opinion). Mayo Clinic. July 21, 2025. Singer M, et al. The third international consensus definitions for sepsis and septic shock (Sepsis-3). JAMA. 2016; doi:10.1001/jama.2016.0287. Alkaline phosphatase (ALP) blood testAboutCare atMayoClinic PRC-20585390 Tests & Procedures Alkaline phosphatase (ALP) blood test