--- title: GGT (Gamma-Glutamyl Transferase) Test type: test id: ggt url: "https://www.test-well.com/tests/ggt" price_usd: 19.99 lab_fee_usd: 6 all_in_usd: 25.99 cpt: 82977 category: Liver Health sample: Blood draw fasting_required: false results_in: "1–3 business days" labs: - Quest - Labcorp - BioReference orderable: true reviewed_at: 2026-09-14 order_url: "https://www.test-well.com/cart?add=ggt&utm_source=ai_agent&utm_medium=markdown" --- # GGT (Gamma-Glutamyl Transferase) Test > 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. ## Key facts | Fact | Value | | --- | --- | | Price | $19.99 + $6 lab processing fee per order ($25.99 all-in for this test alone) | | CPT code | 82977 | | Sample | Blood draw | | Fasting | Not required | | Results | 1–3 business days | | Labs | Quest Diagnostics, Labcorp, BioReference (NY & NJ) | | Biomarkers measured | 1 | | Physician authorization | Included — no doctor's visit, referral or insurance needed | | Payment | Card, HSA or FSA; cash-pay only (no insurance billing) | ## What does the GGT (Gamma-Glutamyl Transferase) test tell you? Sensitive marker for bile duct issues and alcohol-related liver damage. 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. **Clinical use:** 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. ## Who should order it? 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. ## Biomarkers measured - [GGT](https://www.test-well.com/biomarkers/ggt) ## Price by lab | Lab | Test price | All-in (with $6 fee) | Notes | | --- | --- | --- | --- | | Quest Diagnostics | $19.99 | $25.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | | Labcorp | $20.99 | $26.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | | BioReference (NY & NJ) | $20.99 | $26.99 | New York and New Jersey orders route here automatically | Rhode Island is not served. Prices are identical online and in the lab; no draw fee or physician fee is added. ## How much does a GGT (Gamma-Glutamyl Transferase) test cost? 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. | 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 2026-09-12](https://www.ondemand.labcorp.com/lab-tests/ggt-test) | | Hospital outpatient lab, self-pay (typical) | $80.00 | $80.00 | Reference figure; hospital charges vary widely by facility and are often higher | Lab test codes: Quest test code 482 · Labcorp test no. 001958 · BioReference code 0093-5. ## How do you prepare? Avoid alcohol for at least 24 hours. No fasting required. ## Related conditions - Alcoholic liver disease (K70.9) - Cholestasis (K83.1) - Non-alcoholic fatty liver disease (K76.0) - Bile duct obstruction (K83.1) ## Common questions about the GGT (Gamma-Glutamyl Transferase) test ### What's a normal GGT level? Men: 8-61 U/L. Women: 5-36 U/L. GGT is highly inducible — elevated GGT with otherwise-normal liver enzymes is the classic 'silent' marker of heavy alcohol use (>4 drinks/day for weeks). Levels >2x upper limit warrant investigation for biliary or alcohol-related liver disease. ### Why test GGT in addition to ALT/AST? GGT catches biliary tract disease (gallstones, cholestasis, primary biliary cholangitis) and alcohol-related liver injury that ALT/AST can miss. It's also more sensitive than alkaline phosphatase for distinguishing liver vs bone origin of elevated alk phos. ### What's the most common cause of elevated GGT? Regular alcohol consumption — even moderate drinking (1-2 drinks/day for months) can elevate GGT. Other common causes: fatty liver, statins, anti-seizure drugs (phenytoin, carbamazepine), barbiturates, and biliary obstruction. ### How much does a GGT test cost without insurance? On TestWell, GGT is $19.99 — one of our cheapest labs. Quest Direct lists the same test at $25, walk-in hospital labs typically bill $60-80 without insurance. ### What is the CPT code for GGT? The CPT code for Gamma-Glutamyl Transferase is 82977. ### Do I need to fast for a GGT test? No fasting required for GGT alone. But it's almost always ordered alongside other liver tests as part of a [Liver Panel](https://www.test-well.com/tests/liver-health-panel) or [CMP](https://www.test-well.com/tests/comprehensive-metabolic-panel), so most people fast anyway. ### Should I get GGT with other liver tests? Almost always yes. GGT alone is rarely diagnostic — pair it with [ALT](https://www.test-well.com/tests/alt), AST, alkaline phosphatase, and bilirubin. The [Liver Panel](https://www.test-well.com/tests/liver-health-panel) bundles all of these at a discount and gives a complete liver-injury picture. ## How to order 1. Add to cart: https://www.test-well.com/cart?add=ggt&utm_source=ai_agent&utm_medium=markdown 2. Create an account or sign in, confirm your state and preferred lab, pay by card, HSA or FSA. 3. A licensed physician authorizes the order (usually within minutes); the requisition arrives by email. 4. Walk into any Quest Diagnostics, Labcorp, BioReference (NY & NJ) patient service center — no appointment needed at most sites. 5. Results post to your TestWell portal in 1–3 business days with reference ranges and flags. ## Related - [Liver Function Tests Explained: What a Liver Panel Shows and When to Get One](https://www.test-well.com/guides/liver-function-tests) - [Fatty Liver Panel](https://www.test-well.com/tests/fatty-liver-panel) — 6 tests · $92.99 - [Liver Health Panel](https://www.test-well.com/tests/liver-health-panel) — 4 tests · $59.99 - [Men's Health Advanced Panel](https://www.test-well.com/tests/mens-health-advanced-panel) — 22 tests · $299.99 - [All Liver Health tests](https://www.test-well.com/tests/category/liver-health) - [Full test directory](https://www.test-well.com/tests/directory) --- Medically reviewed by Youmna DiStefano, MD (Medical Reviewer, TestWell); last reviewed 2026-09-14. Review policy: https://www.test-well.com/reviewers/youmna-distefano-md Canonical page: https://www.test-well.com/tests/ggt Machine-readable catalog: https://www.test-well.com/api/catalog.json · MCP server: https://www.test-well.com/mcp · Overview for agents: https://www.test-well.com/llms.txt Prices are cash-pay, in USD, and include physician authorization; every order adds one flat $6 lab processing fee. Educational content is not a diagnosis — discuss results with a clinician.