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Test Code LAB4093 GAMMA-GLUTAMYL TRANSFERASE (GGT)

Specimen Type

Preferred Sample:   Lithium Heparin Plasma (PST, Mint Green Tube)
Alternative Sample: Serum (SST, Gold, Corvac, Tiger, Red Top Tube)

Specimen Volume

1 mL

Minimum Volume

0.5 mL

Turnaround Time

STAT: 1 hour

Routine: 4 hours

Sample Stability

Room Temp: 7 days
Refrigerated: 7 days
Frozen: 3 months

Method

Colorimetric

Reference Ranges

Age Range
0 up to 15 days 23 - 219 U/L
15 days up to 1 year 8 - 127 U/L
1 year up to 11 years 6 - 16 U/L
11 years up to 19 years 7 - 21 U/L
19 years and older Male: <55 U/L Female: <38 U/L

 

Reporting Limit

Measuring Range 5 - 1650 U/L

Reporting Limits 5 - 1650 U/L

Synonyms

Gamma- Glutamyl Transferase

CPT Code

82977

 

Limitations

In very rare cases, gammopathy, in particular type IgM (Waldenstrom's Macroglobulinemia), may cause unreliable results.