Test Directory

Clear All
Test Code
APHI
Test Name
Alkaline Phosphatase Isoenzymes
CPT Codes
84075, 84080
Included Tests
  • Alkaline Phosphatase
  • Isoenzyme Pattern
  • Intestinal Isoenzymes
  • Bone Isoenzymes
  • Liver Isoenzymes
  • Placental Isoenzymes
  • Macrohepatic Isoenzyme
Expected Turnaround Time
2 - 5 days
Clinical Utility

When the Total Alkaline Phosphatase activity is increased, the Isoenzymes are useful in determining the source of the increased activity.
Specimen and Container Info

Specimen Type: Serum

 

Collection Container: Red Top, Plain

Alternate Collection Container: Gold Top, Serum Separator


Desired Specimen Volume: 2 mL
Collection Instructions
  1. Collect a red top, plain tube via venipuncture.  
Processing and Submission Instructions
  1. Separate serum from cells.
  2. Transfer 2 mL of serum to a clear aliquot tube (screw cap).
Transport Instructions

Transport to the laboratory refrigerated
Stability Requirements

Room Temperature

7 days

Refrigerated

21 days

Frozen

21 days

Freeze/Thaw Cycles

Stable x3
Methodology
Electrophoresis | Spectrophotometry
Reference Intervals

See patient report.
Reference Lab
Quest Diagnostics Nichols Institute
Testing Schedule
Routine, 6 times per week
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
© 2026 HNL Lab Medicine. All rights reserved.