Gamma-Glutamyl Transferase
Test Code
GGT
Description
Elevated GGT is found in all forms of liver disease. Measurement of GGT is used in the diagnosis and treatment of alcoholic cirrhosis, as well as primary and secondary liver tumors. It is more sensitive than alkaline phosphatase, the transaminases, and leucine aminopeptidase in detecting obstructive jaundice, cholangitis, and cholecystitis. Normal levels of GGT are seen in skeletal diseases; thus, GGT in serum can be used to ascertain whether a disease, suggested by elevated alkaline phosphatase, is skeletal or hepatobiliary.
Collect
Plain red top or SST tube.
Pediatric Collection
Minimum volume: 0.1 mL serum
Storage Transport Temp
Offsite: Send frozen serum Priority Overnight via FedEx and in a well insulated container on dry ice.
Stability
Stability after cell separation:
perform testing ASAP after collection.
1 month refrigerated at 2-8°C
1 year frozen at -20°C
Performed
Monday - Friday
Methodology
Enzymatic
Turnaround Time
4 hour routine, 1 hour STAT
Department
Core Lab
Synonyms
Enzymatic (Gamma Glutamyl Transferase);GGT
Study Offerings
Not offered
Reference Interval
| Gamma Glutamyl Transferase, Serum |
Human |
|
|
Male |
Female |
|
|
U/L |
||
|
Newborn - 9 years |
6-16 |
6-19 |
|
10 years - 18 years |
7-26 |
8-23 |
|
19+ years |
7-64 |
7-64 |
CPT Code
82977
New York Approved
FDA Approved or Cleared
FDA
Approved or Cleared