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HelpCatalog ID Mg Magnesium (Plasma)
CPOE Test Name
Magnesium Level
Synonyms
Mg
Specimen Type
Plasma
Specimen Requirements
5 mL light green top tube (lithium heparin); light green cap microtainer acceptable; 2 mL blood
Reference Values
1.3 – 2.7 mg/dL
Causes for Rejection
Wrong container; improper labeling; insufficient specimen
Turn Around Time
Urgent/Emergent 1 hour; Routine 2 – 4 hours
CPT / HCPCS Code
83735
Performing Lab
Core Laboratory AD 3301 721-2120; Cancer Center Lab AM 2610 721-1739
Critical Values
≤ 1.2 mg/dL or ≥ 5.8 mg/dL