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Gamma Glutamyl Transferase, Serum or Plasma
0020009
Ordering Recommendation

May be useful as an indirect marker of alcohol abuse, nonalcoholic fatty liver disease, drug intoxication, or other liver diseases.

Mnemonic
GT
Methodology
Quantitative Enzymatic
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Serum separator tube or plasma separator tube. Also acceptable: Pink (K2EDTA). 
Specimen Preparation
Allow serum tube to clot completely at room temperature. Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.2 mL) 
Storage/Transport Temperature
Refrigerated. 
Unacceptable Conditions
Grossly hemolyzed specimens. 
Remarks
 
Stability
After separation from cells: Ambient: 1 week; Refrigerated: 1 week; Frozen: 2 months 
Reference Interval
By report (reports may vary based on instrumentation)
Interpretive Data


Note
CPT Code(s)
82977
Components
Component Test Code*Component Chart NameLOINC
0020009Gamma Glutamyl Transferase2324-2
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Gamma GT
  • Gamma-Glutamyl
  • Gamma-glutamyl Transpeptidase
  • Gamma-Glutamyltranspeptidase
  • GGT
  • GGTP
  • GT