GGT

Test Code

LAB85

Alias/See Also

Gamma glutamyl transferase

CPT Codes
82977

Preferred Specimen

4.5 ml (600 ul min) lithium heparin (green); alternate-SST (gold)

Minimum Volume

1 ml (200 ul minimum) plasma; alternate-serum

Other Acceptable Specimens

Gold SST

Instructions

Spin PST or SST and send to lab. After centrifugation, if not in gel barrier tube, pour off plasma or serum into an aliquot tube.

Transport Temperature

Room temp

Specimen Stability

Separated from cells: 24 hours room temp, 7 days refrigerated

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

Icteric: >40 mg/dL bilirubin, Hemolysis: >350 mg/dL Hemoglobin, Lipemia: >1000 mg/dL triglycerides

Methodology
Enymatic Rate

Setup Schedule

Mon-Sun

Reference Range

8-61 U/L

Clinical Significance

Gamma-glutamyltransferase measurements are used in the diagnosis and treatment of liver diseases such as alcoholic cirrhosis
and primary and secondary liver tumors

Performing Laboratory
Piedmont Athens Regional

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.