Update Type: Reference range changed
Test Updated: 08/31/2022
Test Overview
Test Methodology

Rate Colorimetric (pNPP Substrate)

Test Usage

Liver function test; evaluation of metabolic bone disease.

Reference Range *

Male: 1 mo. - 1 year: 120 - 470 IU/L, 1 - 9 years: 140 - 335 IU/L, 10-12 years: 130 - 420 IU/L, 13 - 14 years: 115 - 420 IU/L, 15 - 16 years: 80 - 300 IU/L, 17 - 150 years: 40 - 116.
Female: 1 mo. - 1 year: 120 - 470 IU/L, 1 - 9 years: 140 - 335 IU/L, 10-12 years: 130 - 420 IU/L, 13 - 14 years: 52 - 255 IU/L, 15 - 16 years: 50 - 116 IU/L, 17 - 150 years: 40 - 116.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Do not use grossly hemolyzed samples

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

4 hours

Soft Order Code
ALK
MiChart Code
Alkaline Phosphatase
Synonyms
  • ALK
  • Alk Phos
  • ALKALINE PHOSPHATASE
Laboratory
Chemical Pathology
Section
Automation
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required).

Specimen Requirements
Collection Instructions

Collect specimen in an SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate. Hemolyzed samples should not be used for testing.

Alternate Specimen
Red top or Green top (sodium or lithium heparin) tube. [rev 11/09]
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Billing
CPT Code
84075
Fee Code
20515
LOINC
6768-6