An alkaline phosphatase (ALP) test measures the amount of ALP in your blood. ALP is an enzyme, a protein that speeds up certain chemical reactions in your body. ALP is found in all your body tissues, but higher amounts can be found in your liver, bile ducts, and bones. Each part of your body makes a different type of ALP.
An alkaline phosphatase test is often used to screen for or help diagnose diseases of the liver or bones. The test may also help diagnose or monitor other health conditions.
Source: MedlinePlus, U.S. National Library of Medicine
Normal range
- Normal
- 30–120 U/L
- Female · ≤ 1 y
- 122–469 U/L
- Female · ≤ 10 y
- 142–335 U/L
- Female · ≤ 13 y
- 129–417 U/L
- Female · ≤ 14 d
- 83–248 U/L
- Female · ≤ 15 y
- 57–254 U/L
- Female · ≤ 17 y
- 50–117 U/L
- Female · ≤ 5 d
- 47–127 IU/L
- Female · 1 y – 6 y
- 158–369 IU/L
- Female · 11 d – 20 d
- 109–357 IU/L
- Female · 17 y+
- 35–104 U/L
- Female · 18 y – 20 y
- 42–106 IU/L
- Female · 21 d – 30 d
- 94–494 IU/L
- Female · 21 y – 50 y
- 41–116 IU/L
- Female · 3 mo – 6 mo
- 131–452 IU/L
- Female · 30 d – 2 mo
- 149–539 IU/L
- Female · 51 y – 80 y
- 49–135 IU/L
- Female · 6 d – 10 d
- 29–242 IU/L
- Female · 7 mo – 11 mo
- 117–401 IU/L
- Female · 7 y – 12 y
- 150–409 IU/L
- Male · ≤ 1 y
- 122–469 U/L
- Male · ≤ 10 y
- 142–335 U/L
- Male · ≤ 13 y
- 129–417 U/L
- Male · ≤ 14 d
- 83–248 U/L
- Male · ≤ 15 y
- 116–468 U/L
- Male · ≤ 17 y
- 82–331 U/L
- Male · ≤ 19 y
- 55–149 U/L
- Male · ≤ 5 d
- 47–127 IU/L
- Male · 1 y – 6 y
- 158–369 IU/L
- Male · 11 d – 20 d
- 109–357 IU/L
- Male · 18 y – 20 y
- 51–125 IU/L
- Male · 19 y+
- 40–129 U/L
- Male · 21 d – 30 d
- 94–494 IU/L
- Male · 21 y – 50 y
- 47–123 IU/L
- Male · 3 mo – 6 mo
- 131–452 IU/L
- Male · 30 d – 2 mo
- 149–539 IU/L
- Male · 51 y – 80 y
- 47–123 IU/L
- Male · 6 d – 10 d
- 29–242 IU/L
- Male · 7 mo – 11 mo
- 117–401 IU/L
- Male · 7 y – 12 y
- 150–409 IU/L
Ranges from American Board of Internal Medicine (Laboratory Test Reference Ranges), LabCorp Test Directory, Mayo Clinic Laboratories (Pediatric Test Catalog), Mayo Clinic Laboratories (Test Catalog).
All 67 source ranges
What an abnormal result can be associated with
- A high result
- Elevated circulating alkaline phosphatase concentration
- A low result
- Decreased circulating alkaline phosphatase activity
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis — only a clinician can interpret your result in context.
Details
- Sample
- Serum or plasma · LOINC
- Collection
- Serum gel tube · 1 mL · Mayo Clinic Laboratories (Test Catalog)
- Part of
- Comprehensive metabolic panel · Hepatic function panel
- Listed under
- Bile Duct Cancer · Bile Duct Diseases · Bone Diseases · Cirrhosis · Gallbladder Cancer · Hemochromatosis · Hepatitis · Hepatitis A · Hepatitis B · Hepatitis C · Jaundice · Liver Cancer
- Code
- LOINC 6768-6 · U/L
- Also known as
- ALKP, Phosphtase, AP, Alk, Orthopedics