Magnesium, RBC

Test Code
623


CPT Codes
83735

Preferred Specimen
0.5 mL packed RBC cells collected in an EDTA (lavender-top) tube or sodium heparin (royal blue-top) tube


Patient Preparation

Patient should refrain from taking vitamins, or mineral herbal supplements for at least one week before sample collection



Minimum Volume
0.2 mL RBCs • 0.5 mL whole blood


Other Acceptable Specimens
1 mL whole blood collected in: EDTA (lavender-top) tube, EDTA (royal blue-top) tube, or sodium heparin (royal blue-top) tube


Instructions
Packed RBCs: Centrifuge specimen and discard plasma within two hours of collection. Transfer RBCs to a plastic transfer vial.

Whole blood: Do not centrifuge whole blood.


Transport Container
Trace-element and metal-free transport tube


Transport Temperature
Refrigerated (cold packs)


Specimen Stability
Packed RBC cells
Room temperature: 7 days
Refrigerated: 7 days
Frozen: Unacceptable

Whole blood
Room temperature: 4 days
Refrigerated: 7 days
Frozen: Unacceptable


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


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 FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

This test is not available for New York patient testing at med fusion-Lewisville, TX.
Orders for New York patients will be redirected to Quest Diagnostics Nichols Institute-Chantilly, VA for testing.

Setup Schedule
Mon, Thurs


Reference Range
4.0-6.4 mg/dL


Clinical Significance
Magnesium is an essential trace element. Deficiency leads to irritability, neuromuscular abnormalities, cardiac and renal damage. Its salts are used as antacids and cathartics. Excessive amount may cause CNS depression, loss of muscle tone, respiratory and cardiac arrest.


Performing Laboratory
med fusion
2501 South State Hwy 121, Suite 1100
Lewisville, TX 75067-8188




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.