A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Magnesium, RBC

Test Code
RBCMG


Alias/See Also

LAB104



CPT Codes
<p>83735</p>

Preferred Specimen

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

 

Specimen Type: Packed Red Blood Cells (RBCs) (Preferred)

Collection Container/Type

Preferred: Dark Blue EDTA (Metal free)

Acceptable: Lavender top (EDTA)

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions: 

  1. Centrifuge to separate plasma from RBCs and discard plasma. Transfer RBCs to a plastic transfer vial from a Quest Diagnostics (trace element and metal free) collection kit.

 

Specimen Type: Whole Blood (EDTA)

Collection Container/Type

Preferred: Dark Blue EDTA (Metal free)

Acceptable: Lavender top (EDTA)

Specimen Volume: 1 mL

Collection Instructions: 

  1. Do not centrifuge whole blood.


Patient Preparation

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



Minimum Volume

Packed RBCs: 0.2 mL


 


Whole Blood: 0.5 mL



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


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

Whole blood: Do not centrifuge whole blood.


Transport Container
Plastic transfer vial


Transport Temperature
Refrigerated (cold packs)


Specimen Stability

Packed
RBCs


Room temperature: 7
days


Refrigerated: 7
days


Frozen:
Unacceptable


 


Whole
Blood


Room temperature: 4
days


Refrigerated: 7
days


Frozen:
Unacceptable



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

Tues-Sat



Report Available

4 days



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
Quest Diagnostics Nichols Institute 14225 Newbrook Drive Chantilly, VA 20153


Last Updated: February 17, 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.