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Test Code MG MAGNESIUM

Specimen Tube Description

Mustard Top (Outpatient) / Green Lithium Heparin (Inpatient)

Specimen Type

Serum/Plasma

Specimen Required

1mL serum or 1mL plasma (Lithium Hep)

Specimen Preparation

Spin and separate ASAP after collection; *AVOID HEMOLYSIS*

Specimen Stability Information

Ambient 7 days, Refrigerated 7 days, Frozen 1 month

Instructions

For outpatients draw mustard tube, for inpatients draw light green lithium heparin tube.

Day(s) and Times(s) Performed

24 hrs a day 7 days a week

Additional Information

Specimen must be free from hemolysis

Performing Laboratory

United Health Services Laboratories

CPT Code

83735

LOINC

19123-9