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Test Code GGT Gamma-Glutamyl Transpeptidase (GGT), Plasma or Serum

Additional Codes

Epic Test ID


Performing Laboratory

Bronson Laboratory Services-Chemistry

Reference Values

Men: 8-61 U/L

Women: 5-36 U/L


Spectrophotometry (SP)

Specimen Transport Temperature


Specimen Requirements



Specimen Type: Serum
Container/Tube: Gold or Red
Specimen Volume: 5 mL

Specimen Minimum Volume: 1 mL



Specimen Type: Plasma
Container/Tube: Mint or Green

Specimen Volume: 5 mL

Specimen Minimum Volume: 1 mL

Specimen Stability

Serum*, Room Temperature - 7 days

Serum*, Refrigerated - 7 days

Serum*, Frozen - 1 year

*Note: Heparinized plasma in gel separator tubes is less stable than serum and is only suitable for add-on testing up to 2 days following sample collection.

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding