Magnesium Level
Additional Codes
LAB103
Performing Laboratory
MBMC Main Laboratory
Methodology
Colorimetric -Xylidyl Blue
Specimen Requirements
Specimen Type: Plasma
Container/Tube: Mint green-top (lithium heparin gel)
Specimen Volume: Full tube
Alternative Specimen Type: Serum
Alternative Container/ Tube: Gold, Serum gel
Alternative Specimen Volume: Full tube
Specimen Transport Temperature
Ambient
Day(s) Test Set Up
Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: within 4 hours
Reference Values
1.4-2.5 mg/dL
Critical values (automatic call-back):
All Ages: < 1.0 or >4.8 mg/dL
Test Classification and CPT Coding
Test Classification:
This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer’s instructions.
CPT Code:
83735
Stability
5 days Refrigerated