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Test Code ALKP Alkaline Phosphatase

Specimen and Container/Tube

Specimen Type: Plasma

Preferred Specimen: Li-Heparin Mint Green Top

Other Acceptable specimens: Serum/Red Top, Serum/Gold Top

Specimen Stability

Storage Temperature

Stability

Room temperature

7 days

Refrigerated

7 days

Frozen

2 months

Collection Instructions

Collect specimen per standard laboratory collection procedures. 

 

Specimen Handling and Transport Instructions

UCMC Onsite Instructions: 

Collect specimen per standard collection procedure and send to laboratory immediately. 

 

UCMC Offsite and UC MedLab Outreach Instructions: 

  • Samples should be centrifuged within 2 hours of collection.
  • Centrifuge specimens at >2500 x g for 10 minutes at room temperature.
  • Aliquot sample into plastic transport tube containing a minimum of 0.2 mL of specimen.
  • Samples must be sent room temperature at 15-25oC.

Rejection Criteria

  • Common specimen rejected situations include: incorrect specimen type, insufficient volume, missing or incomplete specimen identifiers, incorrect specimen transport, or specimens outside stability limits. 
  • Specimens that are clotted or grossly hemolyzed.
  • Specimens that were transported unspun/whole blood and draw time is greater than 6 hours.

Reference Values

Test

Age

Sex

Reference Range

Alkaline Phosphatase

< 1 month

All

150 - 420 IU/L

Alkaline Phosphatase

1 month - 18 years

All

100 - 390 IU/L

Alkaline Phosphatase

19 - 60 years

All

30 - 120 IU/L

Alkaline Phosphatase

 > 60 years

All

50 - 150 IU/L

Critical Values

Analyte

Unit

Low

High

Age

N/A

N/A

N/A

N/A

N/A

Turnaround Time

Turnaround times are relative to the time the specimen is received in the test laboratory. 

 

STAT Turnaround Time: 1 hour

Routine Turnaround Time: 4 hours

Testing Schedule: 24/7

Clinical Indications

Useful in the diagnosis and treatment of liver, bone, intestinal and parathyroid disease.

Test Components

Alkaline Phosphatase
 

CPT Codes

84075

LOINC Codes

6768-6

Methodology

Colorimetric Assay Spectrophotometric (Roche Diagnostics)

Synonyms/Keyword Search

ALP, Alk Phos, ALKP

Additional Information

Results should always be assessed in conjunction with patient's medical history, clinical examination and other
findings.

Last Review Date

8/14/2024

Volume

Preferred Volume: 0.5 mL

Minimum Volume: 0.2 mL