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Magnesium, RBC
MessagePatient Preparation: Patient should refrain from taking vitamins, or mineral herbal supplements for at least one week before sample collection. Immediate Specimen Processing: Submit original whole blood specimen to the lab. Ambulatory Transport Temperature to Inova Central Lab: Refrigerated Specimen Stability: 7 days
Test Code
LAB104 RBCMG
Alias/See Also
RBCMG
CPT Codes
83735
Includes
Patient Preparation: Patient should refrain from taking vitamins, or mineral herbal supplements for at least one week before sample collection. @BKRCERMSGREFRESH(2302793)@ @BKRCERMSGREFRESH(2302794)@
Instructions
Processing Instructions: Whole blood specimens are acceptable to send to Quest for testing.Send only one of the following specimens.Whole blood: Do not centrifuge whole blood.Packed RBCs: Centrifuge specimens and discard plasma within two hours of collection. Transfer RBCs to a plastic transfer vial. Preferred Testing Volume: 1 mL whole blood 0.5 mL packed RBCMinimum Testing Volume: 0.5 mL whole blood0.2 mL packed RBC Transport Temperature: Refrigerated Stability: Whole BloodAmbient: 4 daysRefrigerated : 7 daysFrozen: UnacceptablePacked RBC cellsAmbient: 7 daysRefrigerated : 7 daysFrozen: Unacceptable Performing Lab: Quest (Chantilly)
Report Available
6-Days
Clinical Significance
1230170431
Last Updated: May 18, 2026