METFORMIN, SERUM/PLASMA

Test Documentation
Specimen Required
Draw blood in a plain red-top tube. Centrifuge, separate serum from cells and send 1.0 mL serum (0.3 mL minimum) refrigerated in a screw-capped plastic vial.

Alternate Specimen
Plasma: EDTA

Rejection Criteria
SST or PST

Methodology
High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)

Stability
Room temperature: 30 days; Refrigerated: 30 days; Frozen: 24 months

Reference Range
By report

Performed
Wednesday

Turnaround Time5-8 days
Test CodeMETF
CPT-4 Code (s)
80375 (80299)
LOINC Codes
35698-0

Warde
Medical
Laboratory