Zinc, RBC

Test Code
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

Minimum Volume
0.3 mL

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

Instructions
Carefully clean skin prior to venipuncture. Avoid hemolysis. Avoid worksite collection. 
 
Red blood cells trace metal: Use the royal blue-top trace metal evacuated tube (Becton-Dickinson catalog# 367736) with EDTA for RBC trace metal testing. Centrifuge and separate RBCs into an acid washed plastic screw capped vial within two hours of collection. 
 
 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: 7 days
Frozen: Unacceptable

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

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

Setup Schedule
Sets up 5 days a week.

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.



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.