Micronutrient, Magnesium, RBC

Test Code

10212

CPT Codes
83735

Preferred Specimen

0.5 mL packed red blood cells collected in an EDTA (lavender-top or 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 packed red blood cells • 0.5 mL whole blood

Other Acceptable Specimens

1 mL whole blood collected in: EDTA (royal blue-top) tube or EDTA (lavender-top) tube

Instructions

Patients should be 18 years of age or greater.

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 transport tube.

Transport Container

Trace element and metal-free transport tube

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

⁠⁠⁠⁠⁠⁠⁠Packed red blood cells
Room temperature: 30 days
Refrigerated: 30 days
Frozen: 30 days

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

Setup Schedule

Set up: Mon, Thurs; Report available: 2-5 days

Reference Range

≥18 years

4.0-6.4 mg/dL

Reference range not available for individuals <18 years for this micronutrient test.

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.

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.