Zinc, RBC

Test Code

ZNRBC

Alias/See Also

6354

CPT Codes
84630<br>This test is not available for New York patient testing

Preferred Specimen

0.5 mL red blood cells collected in an EDTA trace metal-free (royal blue-top) tube

Patient Preparation
Carefully clean skin prior to venipuncture. Avoid hemolysis. Avoid worksite collection.

Minimum Volume

0.3 mL

Other Acceptable Specimens

Red blood cells collected in: EDTA (lavender-top), or sodium heparin trace metal-free (royal blue-top), or sodium heparin lead-free (tan-top), or sodium or lithium heparin (green-top) tubes

Instructions

Red blood cells Trace Metal: Use the royal blue-top trace metal evacuated tube with EDTA or Sodium Heparin, for RBC trace metal testing.

Packed Cells: Centrifuge to separate plasma from RBC's and discard plasma. Transfer RBC's to a plastic transfer vial from a Quest Diagnostics (trace element and metal free) collection kit or transfer to a plastic screw cap vial.

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 10 days
Frozen: Unacceptable

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Clotted • Moderate hemolysis

Methodology
Inductively Coupled Plasma/Mass Spectrometry (ICP/MS)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Set up: Tues-Sat; Report available: 2-4 days after receipt at the performing laboratory. Add three (3) days for transport.

Reference Range

9.0-14.7 mg/L

Clinical Significance

Zinc is an essential element involved in a myriad of enzyme systems including wound healing, immune function, and fetal development. Zinc measurements are used to detect and monitor industrial, dietary, and accidental exposure to zinc. Also, Zinc measurements may be used to evaluate health and monitor response to treatment.

Performing Laboratory
Quest Diagnostics Nichols Institute Valencia
27027 Tourney Road
Valencia, CA 91355-5386

Last Updated: June 22, 2023

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.