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Magnesium Blood

Test Code
MG


CPT Codes
83735

Preferred Specimen
0.6 ml of whole blood (0.3 mL of serum or plasma)


Minimum Volume
0.2 mL of whole blood (0.1 mL of serum or plasma)


Transport Container
Serum separator (gold top) or for Inpatients/MSTI/ED only lithium heparin (green or mint top)


Transport Temperature
Room Temperature


Specimen Stability
Room Temperature: 1 week
Refrigerated: 1 week
Frozen: 1 month at -18 C


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis


Methodology
Colorimetric

Setup Schedule
Daily


Report Available
Inpatient turn around time: Stat 30 minutes, routine 3 hours.  Outpatient specimens received by noon will be reported by 4:30. Specimens received after noon will be reported by the next morning.




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.