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Gamma-glutamyl Transferase
MessageGamma-glutamyltransferase measurements areused in the diagnosis and treatment of liver diseases such as alcoholic cirrhosis and primary and secondary liver tumors.
Test Code
GGT
Alias/See Also
LAB3000066
GGT
GGT
CPT Codes
82977
Preferred Specimen
2.0 mL serum collected in a gold serum separator tube (SST)
Minimum Volume
0.5 mL serum
Other Acceptable Specimens
2.0 mL serum collected in an orange rapid clot serum separator tube (RCT)
2.0 mL plasma collected in a light green lithium heparin plasma separator tube (PST)
2.0 mL plasma collected in a light green lithium heparin plasma separator tube (PST)
Specimen Stability
24 hours at Room Temperature (15-25oC)
4 weeks when Refrigerated (2-8o)
1 year when frozen at <-20oC
4 weeks when Refrigerated (2-8o)
1 year when frozen at <-20oC
Reference Range
| Sex | Age | Reference Range |
|---|---|---|
| M/F | 0 - 3 months | 9 - 250 U/L |
| M/F | 4 - 12 months | 9 - 100 U/L |
| M | 1 - 12 years | 9 - 51 U/L |
| M | 13 - 150 years | 9 -64 U/L |
| F | 1 - 150 years | 9 - 51 U/L |
Performing Laboratory
Penn Medicine Lancaster General Health
