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Test Code ALKP Alkaline Phosphatase, Total and Isoenzymes, Serum

Additional Codes

Epic Ordering Code LAB3041518
NBS code LBC10852
Service code 36952

Reporting Name

Alkaline Phosphatase, Tot and Iso,S

Specimen Type

Serum


Necessary Information


Patient's age and sex are required.



Specimen Required


Patient Preparation:

Fasting: 8 hours, required

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions:

1. Within 2 hours of collection, centrifuge the specimen.

2. For red top tubes, immediately aliquot into a plastic vial.

3. For serum gel tubes, serum may sit on gel refrigerated but must be aliquoted within 7 days.


National University Hospital-Singapore Note:

NUH Outreach Laboratories:
Specimen Requirements
Submit only one of the following:
Preferred: Gold Top
Acceptable: Red Top
Processing Requirements
Centrifuge within 2 hours and aliquot serum into a plastic vial immediately.
Specimen type: Serum
Volume: 1 mL
Storage/transport requirements: Frozen

Forms

If not ordering electronically, complete, print, and send a Kidney Transplant Test Request with the specimen.

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Frozen (preferred) 14 days
  Ambient  7 days
  Refrigerated  7 days

Reject Due To

Gross hemolysis Reject
Gross lipemia OK
Gross icterus Reject

Method Name

ALP: Colorimetric

ALPI: Electrophoresis

Profile Information

Test ID Reporting Name Available Separately Always Performed
ALP Alkaline Phosphatase, S Yes Yes
ALPI Alkaline Phosphatase Isoenzymes, S No Yes

Day(s) Performed

Tuesday through Saturday

Report Available

3 to 5 days
National University Hospital-Singapore Note:

Please note that this is a referral test requiring transport to the external testing facility and an additional 3-5 days is required.

Reference Values

ALKALINE PHOSPHATASE

Males

0-14 days: 83-248 U/L

15 days-<1 year: 122-469 U/L

1-<10 years: 142-335 U/L

10-<13 years: 129-417 U/L

13-<15 years: 116-468 U/L

15-<17 years: 82-331 U/L

17-<19 years: 55-149 U/L

≥19 years: 40-129 U/L

Females

0-14 days: 83-248 U/L

15 days-<1 year: 122-469 U/L

1-<10 years: 142-335 U/L

10-<13 years: 129-417 U/L

13-<15 years: 57-254 U/L

15-<17 years: 50-117 U/L

≥17 years: 35-104 U/L

 

ALKALINE PHOSPHATASE ISOENZYMES

Ages:

≤17 years: Reference values have not been established for patients younger than 18 years.

≥18 years:

Liver %: 30.2-74.7

Liver U/L: 15.8-71.9

Bone %: 23.8-68.3

Bone U/L: 12.0-56.7

Intestine %: ≤22.5

Intestine U/L: ≤12.6

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Aid in the diagnosis and treatment of liver, bone, intestinal, and parathyroid diseases

 

Determining the tissue source of increased alkaline phosphatase (ALP) activity in serum

 

Differentiating between liver and bone sources of elevated ALP

CPT Code Information

84075

84080

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ALKP Alkaline Phosphatase, Tot and Iso,S 24332-9

 

Result ID Test Result Name Result LOINC Value
ALP Alkaline Phosphatase, S 6768-6
622367 Alkaline Phosphatase Isoenzymes, S 12805-8
622369 Liver Percent 15015-1
622368 Liver 1779-8
622371 Bone Percent 15013-6
622370 Bone 1777-2
622373 Intestine Percent 15014-4
622372 Intestine 1778-0

Secondary ID

622157

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.
National University Hospital-Singapore Additional Information:

Last updated 22/06/2026