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Test Code MGRBC Magnesium, Red Blood Cells

Performing Laboratory

LabCorp, Burlington, NC


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

Specimen Requirements

Container/Tube:  Dark Blue top (EDTA) tube(s) 

Specimen:  1.0 mL packed red blood cells in metal free vial (0.2 mL min)

Transport Temperature:  Refrigerated

Stability: 14 Days Room Temperature or Refirgerated


Collection Instructions:  Centrifuge to separate plasma from RBC's and discard plasma. Transfer RBC's to a metal free plastic transfer vial.

Reference Values

4.2-6.8 mg/dL


TAT: 3-5 Days

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


Test Classification and CPT Coding



LONIC Code:  26746-8

Useful For

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.

Computer interface code

PDM # 5900945

Used For

Evaluate magnesium deficiency