The short answer
Sensitive marker for bile duct issues and alcohol-related liver damage, measured from a standard blood draw. At TestWell it costs $19.99 plus a $6 lab fee, needs no fasting, and results post in 1–3 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp.
Hospital Lab
$80
cash pay
Other Labs
$25
+ lab fees
TestWell
$19.99
+ $6 lab fee
GGT is an enzyme found in the liver and bile ducts. It's one of the most sensitive markers for liver and bile duct problems. GGT is particularly useful for detecting alcohol-related liver damage and bile duct obstruction. It's often ordered alongside other liver enzymes to help differentiate between liver and bone sources of elevated alkaline phosphatase.
Gamma-Glutamyl Transferase — the most sensitive marker of biliary obstruction and the best single marker for alcohol-related liver injury. Often elevated when AST/ALT are still normal.
Anyone with elevated alkaline phosphatase (to confirm liver vs bone origin), suspected alcohol-related liver disease, monitoring statin or anti-seizure medications, evaluating bile duct obstruction.
Sample Type
Blood draw
Fasting
Not required
Results In
1–3 business days
Performed At
Quest or Labcorp
Your GGT (Gamma-Glutamyl Transferase) results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 1–3 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
Avoid alcohol for at least 24 hours. No fasting required.
A GGT (Gamma-Glutamyl Transferase) test costs $19.99 at TestWell — $25.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. Ordered directly from the labs' own consumer sites, the same test lists at $59.00 at Labcorp OnDemand (list prices checked Sep 12, 2026). Hospital outpatient labs typically bill around $80.00 self-pay for the same test, and often more. With insurance, what you pay depends on your deductible and your plan's negotiated rate; TestWell's price is fixed before the draw and is HSA/FSA-eligible. Full cost breakdown →
| Where you order | Price | One test, all-in | Notes |
|---|---|---|---|
| TestWell (drawn at Quest or Labcorp) | $19.99 | $25.99 | Includes the one $6 lab processing fee, charged once per order |
| Labcorp OnDemand (Labcorp's own site) | $59.00 | $59.00 | list price checked Sep 12, 2026 |
| Hospital outpatient lab, self-pay (typical) | $80.00 | $80.00 | Reference figure; hospital charges vary widely by facility and are often higher |
56% less than the lower lab-direct list price, for the same draw at the same lab. Lab test codes: Quest test code 482 · Labcorp test no. 001958 · BioReference code 0093-5. Competitor prices are read from the linked public pages and re-checked regularly; the labs' sites may add taxes or change prices without notice.
Compare more: Quest Diagnostics price list · Labcorp price list · Quest vs Labcorp · Lab test price checker
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
TestWell Price
$19.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
Better value: the Liver Health Panel
Save $70.97This test is part of the Liver Health Panel — 4 tests · 13 biomarkers for $59.99, $70.97 less than à la carte.
$59.99$130.96
4 tests · 13 biomarkers
Frequently ordered together
Customers who ordered GGT (Gamma-Glutamyl Transferase) also added these for a more complete health picture.
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GGT (Gamma-Glutamyl Transferase)
$19.99