Ordering Recommendation

Useful as an indicator of chronic exposure to lead, primarily in the industrial setting. For iron deficiency assessment, Iron and Iron Binding Capacity (0020420) and Ferritin (0070065) are recommended. For lead exposure assessment, Lead Blood (Venous) (0020098) is preferred. For occupational exposure to lead assessment, Zinc Protoporphyrin (ZPP) Whole Blood Industrial (0020614) or Lead Industrial Exposure Panel, Adults (0025016) are recommended.




Quantitative Hematofluorometry




1-4 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation

Lavender (EDTA); Royal blue, (EDTA), tan (EDTA), or pink (K2 EDTA). Use royal blue (EDTA) tube when also testing for lead.

Specimen Preparation

Transport 1 mL whole blood. (Min: 0.2 mL)

Storage/Transport Temperature


Unacceptable Conditions

Specimens not collected in EDTA. Clotted, frozen, or hemolyzed specimens.


Ambient: 30 hours; Refrigerated: 5 weeks; Frozen: Unacceptable

Reference Interval

0-69 µmol ZPP/ mol Hem

Interpretive Data

This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.

Compliance Category

Laboratory Developed Test (LDT)


Elevated ZPP results are seen in early and late iron deficiency, the anemia of chronic disease, chronic lead poisoning, and erythropoietic protoporphyria.  Elevated bilirubin or riboflavin and hemolyzed, clotted, or improperly aliquoted specimens may falsely increase the ZPP concentration.

A more specific test for free protoporphyrin is Porphyrins, Serum Total (0080429).  Erythrocyte Porphyrin (EP), Whole Blood (0020610), measures free protoporphyrin and zinc protoporphyrin.

Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
0020606 Zinc Protoporphyrin (ZPP) WholeBld Ratio 29763-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • Porphyrins
  • ZP
  • ZPP
  • ZPP/Heme Ratio
Zinc Protoporphyrin (ZPP), Whole Blood