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Test Code GGT Gamma Glutamyl Transferase

Important Note

Medicare frequency limitations exist for this test in addition to diagnosis requirements. Click on link for list of medically necessary diagnoses: http://www.munsonhealthcare.org/medical-necessity. Click on link for Advance Beneficiary Notice of Noncoverage form: Advance Beneficiary Notice of Noncoverage

EHR Test Codes

  Test Code Test Name
Atlas GGT Gamma GT
Cerner GGT Gamma Glutamyl Transferase

 

Specimen Requirements

Preparation of Patient: 

None

 

Container Type: 

Gold Top SST Gel & Clot Activator Tube

Specimen Type:

Serum

 

Specimen Volume: 

2.5 mL of Serum minimum 1.0 mL of Serum

 

Specimen Handling/Transport:

Separate serum from cells within 2 hours of collection.

Transport refrigerated 2-8°C.

 

Specimen Stability/Storage:

8 hours ambient room temperature

5 days refrigerated 2-8°C

 

Specimen Rejection:

Moderate hemolysis

Performing Laboratory

Munson Medical Center Laboratories

Chemistry Department

Priority, Frequency, & Turnaround

Priority:

STAT, ASAP, Non-Emergent

 

Frequency:

24 hours 7 days a week

 

Turnaround:

0 - 1 days

STAT 60 minute from receipt in lab

Methodology

Glutamyl-carboxy-p-nitroanilide

Reporting

Reference Range: 

Male:  7 - 50 U/L

Female: 3 - 34 U/L

 

Critical Decision: 

None

Clinical Significance

Renal tissue has the highest level of GGT but the enzymes presence in serum appears to originate primarily from the hepatic system. GGT activity is elevated in any and all forms of liver disease. It is more sensitive than alkaline phosphatase in detecting obstructive jaundice, cholangitis and cholecystitis; the rise occurs earlier than with alkaline phosphatase and persists longer. Normal levels of GGT are seen in cases of skeletal diseases.

CPT Code

82977