Alkaline Phosphatase Isoenzymes (ALKISO)

Test Code

Quest Code

CPT Codes
84075, 84080

Alkaline Phosphatase, Intestinal Isoenzymes, Bone Isoenzymes, Liver Isoenzymes, Placental Isoenzymes, Macrohepatic Isoenzymes

Preferred Specimen
2 mL serum in gold top tube

Other Acceptable Specimens
Plain red top tube

Age and sex of patient are necessary for interpretation of results. Overnight fasting is preferred.

Transport Container
Transport tube

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 21 days
Frozen: 21 days

Electrophoresis • Spectrophotometry (SP)

Reference Range
See Laboratory Report

Clinical Significance
When the Total Alkaline Phosphatase activity is increased, the Isoenzymes are useful in determining the source of the increased activity.

Performing Laboratory
Quest Diagnostics - South Region

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.