Skip to main content

Specimen Collection Manual and Test Catalog

  or
  or
  or

GGTP

Geisinger Epic Procedure Code:  LAB2350    Geisinger Epic ID:  14358

SPECIMEN COLLECTION
Specimen type: 

Plasma or Serum


Preferred collection container: 
Specimen required: 

2 mL of serum or plasma; minimum 0.2 mL.



SPECIMEN PROCESSING
Processing instructions: 

Allow serum to clot. Centrifuge to separate serum or plasma within 2 hours of collection.


Transport temperature: 

Refrigerated (preferred). Room temperature or frozen specimen also acceptable.


Specimen stability: 

Room temperature: 7 days. Refrigerated: 7 days. Frozen: 1 year.


Rejection criteria: 

Stability limits exceeded.



TEST DETAILS
Reference interval: 

GGTP (U/L)
0 to 182 days: <=132 
183 days to <1 year: <=39 
1 year to <13 years: <=22 
13 years to < 18 years - female: <=24
13 years to <18 years male: <=42 
>= 18 years: Male: 0-60. Female 0-40


CPT code(s):  82977
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.
The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.

Test includes: 

Gamma glutamyl transpeptidase.


Methodology: 
Spectrophotometric (Colorimetric)
Synonyms: 

GGTP, GGT, G-G-TRANSPEPTIDASE


Clinical significance: 

Elevated GGTP is found in all forms of liver disease. Measurement of GGTP is used in the diagnosis and treatment of alcoholic cirrhosis as well as primary and secondary liver tumors.


Doctoral Director(s): 
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC
Review Date:  12/27/2024

Performing Locations