Leukocyte Alkaline Phosphatase Stain

Test Code

LAPST

Alias/See Also

LAP, LAP Stain, LAP Smear

CPT Codes
85544

Preferred Specimen

GREEN-6 mL Lithium Heparin
6 unfixed smears
Protect from Light

Instructions

Whole blood. Do not centrifuge.

Reference Range

20-146 score

Clinical Significance

Marked increase in peripheral blood leukocyte alkaline phosphatase is observed in multiple myeloma, Hodgkin's disease, polycythemia vera and infectious leukocytosis. Low or absent activity is seen in chronic myelocytic leukemia, hereditary hypophosphatasia and paroxysmal nocturnal hemoglobinuria.

Performing Laboratory
ARUP Laboratories

Additional Information
LAP ARUP

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.