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Test Code
ZPPB
Test Name
Protoporphyrin, Zinc
CPT Codes
84202
Expected Turnaround Time
2 - 4 days
Clinical Utility

Monitor chronic industrial exposure to lead. This test is for workplace monitoring.
Specimen and Container Info

Specimen Type: Whole Blood

 

Collection Container: Royal Blue Top (EDTA)

Alternate Collection Container: Tan Top (EDTA)

 

Desired Specimen Volume: 7 mL
Collection Instructions
  1. Collect a royal blue (EDTA) tube via venipuncture.
  2. Mix tube thoroughly to avoid clotting.
Processing and Submission Instructions
  1.  Transport 7 mL of whole blood in the original collection container.
Transport Instructions

Transport to the laboratory refrigerated. 
Stability Requirements

Room Temperature

5 days

Refrigerated

7 days
Causes for Rejection
  • Clotted specimen
  • Frozen specimen
  • Hemolyzed specimen
  • Icteric specimen
Methodology
Fluorometry
Reference Intervals

See patient report.
Limitations

Fluorescent substances in plasma may interfere with hematofluorometer results. Skin contamination may lead to false elevations. Both this test and blood lead are needed for full evaluation.

This test is not intended for the evaluation of suspected porphyrias, including congenital erythropoietic porphyria. The Porphyrins, Evaluation, RBC test is intended for that purpose. This test is intended for the evaluation of suspected lead toxicity and iron deficiency anemia.
Alternate Names
  • Workplace ZPP
  • ZPP
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Monday-Friday
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.
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