Magnesium, RBC

Test Code

3040003212

Alias/See Also

3040003212

CPT Codes
83735

Preferred Specimen

EDTA Lavender Top Tube

Minimum Volume

1 mL whole blood

Other Acceptable Specimens

EDTA (royal blue-top) tube, or sodium heparin (royal blue-top) tube

Instructions

Send a Lavender EDTA tube WHOLE BLOOD.
DO NOT CENTRIFUGE in red.
Alternative specimens are sent as whole blood as well.

Transport Temperature

Refrigerated

Specimen Stability

Room Temperature: 4 days
Refrigerated: 7 days

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

Frozen specimens and centrifuged blood

Reference Range

SEE RESULT REPORT

Performing Laboratory
QUEST DIAGNOSTICS - NICHOLS CHANTILLY

Last Updated: August 26, 2026

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.