Magnesium, RBC

CPT: 83735
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Expected Turnaround Time

2 - 4 days

Related Information

Related Documents

Specimen Requirements


Red blood cells (RBCs)


1 mL

Minimum Volume

0.2 mL


Green-top (heparin) tube, lavender-top (EDTA) tube, royal blue-top (EDTA) tube, or tan-top lead-free tube


Centrifuge tube as soon as possible and separate plasma from cells. Discard the plasma. Using the original collection tube, submit only the RBCs to the laboratory.

Storage Instructions

Room temperature

Stability Requirements



Room temperature

14 days


14 days

Causes for Rejection

Serum or plasma specimen

Test Details


Evaluate magnesium deficiency


This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration.


Atomic absorption spectrometry (AAS); inductively-coupled plasma/mass spectrometry (ICP/MS)

Reference Interval

3.7–7.0 mg/dL


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
080283 Magnesium, RBC 26746-8 080283 Magnesium, RBC mg/dL 26746-8

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