Sign in →

Test Code N.GGT GGT/GGPT (GAMMA GLUTAMYL TRANSFERASE)

Additional Codes

GTT.1

Methodology

Automated Chemistry Analyzer

Specimen Requirements

Serum or Plasma

Container: SST tube or Green top Lithium heparin

Specimen Collection: 1 mL (minimum 0.5 mL)

  1. Allow specimen to clot completely if  a serum tube (SST) was used. Separate serum (SST) or plasma (Lithium Heparin) from cells within 24 hours and transport refrigerated. If red top tube is collected, separate serum from cells within 2 hours and place in separate plastic tube.
  2. Properly label tube with patients name, DOB, requisition number and type of tube, i.e. GREEN

Specimen Transport/Stability

Refrigerated: 24 hours on gel, 7 days poured off

Specimen Rejection

1. Exceeding stability requirements

2. Unlabeled specimen

Maximum Laboratory Time

24 to 48 hours

Reference Ranges

GGT         U/L
Newborn     10 - 270
1 mo     10 - 160
3 mos     10 - 100
5 mos       5 - 50
8 mos       5 - 30
18 yrs       7 - 64

 

 

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

82977