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Epic Code LAB85 Gamma Glutamyl Transferase (GGT) Level

Test Name Alias

GGT Blood Level | 8146 | 1230100716

Interface Order Alias

10043

Collection Instructions

Specimen Collection: Blood

 

Container(s): Gold Top (Serum Separator-SST Gel) or Light Green Top (Lithium Heparin Gel)

Minimum Volume to Collect: 1.0 mL

Neonate Volume to Collect: 0.5 mL

Capillary collect ok? Yes

Microtainer acceptable: Yes

 

Collection Instructions:

  • After collection, gently invert tube 8-10 times.
  • Specimen should be processed within 2 hours See Processing Instructions.
Processing Instructions

Processed Specimen: Serum or Plasma

Centrifuge/Spin: Yes

Aliquot: Yes

 

Processing Instructions:

  • Serum is preferred specimen type
  • Green Tube/Plasma: Centrifuge after collection.
  • Gold Tube/Serum: Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.

Transport Temperature: Refrigerate

Specimen Transport Temperature

Refrigerate

Specimen Stability

Ambient: 12 hours

Refrigerate: 72 hours

Frozen: aliquot plasma/serum for longer storage

Laboratory Retention: 72 hours

Test Frequency

Available daily, usual TAT 1 day.

Reference Range

Male or Female CHW
0 Minutes up to 8 Days 25 – 250 U/L
8 Days up to 1 Month 12 – 125 U/L
1 Month up to 3 Months 8 – 80 U/L
3 Months up to 16 Years 5 – 35 U/L
16 Years up to 150 Years 10 – 45 U/L

 

Any Age CHS
Males 8 - 61 U/L
Females 5 - 36 U/L

 

Performing Department

Chemistry

Performing Department Laboratory Location

CHW: Corewell Health Reference Laboratory, Grand Rapids, MI
CHS: Corewell Health Lakeland St. Joseph Laboratory, St. Joseph, MI

Methodology

Enzymatic

CPT

82977

CDM Code

3018297701

Epic Test ID

1230100716

LOINC

GGT: 2324-2

Reviewed Date

3/7/2024

Updated Date

5/13/2025 - CHS info added

12/2/2025 - Gold Top Preferred specimen

Orderable Regions

Southwest; West