--- title: PEth Alcohol Biomarker Test type: test id: peth-alcohol url: "https://www.test-well.com/tests/peth-alcohol-biomarker" price_usd: 186.99 lab_fee_usd: 6 all_in_usd: 192.99 category: Drug & Alcohol Screening sample: Blood draw fasting_required: false results_in: "5–7 business days" labs: - Labcorp orderable: true reviewed_at: 2026-09-14 order_url: "https://www.test-well.com/cart?add=peth-alcohol-biomarker&utm_source=ai_agent&utm_medium=markdown" --- # PEth Alcohol Biomarker Test > Measures PEth in blood — the most accurate test for chronic alcohol consumption over the past 3-4 weeks, measured from a standard blood draw. At TestWell it costs $186.99 plus a $6 lab fee, needs no fasting, and results post in 5–7 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Labcorp. ## Key facts | Fact | Value | | --- | --- | | Price | $186.99 + $6 lab processing fee per order ($192.99 all-in for this test alone) | | Sample | Blood draw | | Fasting | Not required | | Results | 5–7 business days | | Labs | Labcorp | | 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 PEth Alcohol Biomarker test tell you? Measures PEth in blood — the most accurate test for chronic alcohol consumption over the past 3-4 weeks. Phosphatidylethanol (PEth) is a phospholipid that forms in red blood cell membranes only in the presence of alcohol. Unlike EtG or liver enzyme tests, PEth provides a highly specific and sensitive marker for alcohol consumption over the preceding 3 to 4 weeks, making it virtually impossible to produce a false positive. It is considered the gold standard for monitoring chronic alcohol use in treatment programs, legal proceedings, and clinical care. **Clinical use:** Drug and alcohol screening detects recent or chronic substance use for clinical, occupational, or personal monitoring purposes. ## Who should order it? Patients being evaluated for substance use, employers requiring confirmation testing, and individuals self-monitoring recovery. ## Biomarkers measured - Phosphatidylethanol (PEth) ## Price by lab | Lab | Test price | All-in (with $6 fee) | Notes | | --- | --- | --- | --- | | Labcorp | $186.99 | $192.99 | Choose at checkout; walk-in patient service centers nationwide (not NY/NJ) | 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 PEth Alcohol Biomarker test cost? A PEth Alcohol Biomarker test costs $186.99 at TestWell — $192.99 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 $142.00 at Quest Health (list prices checked Sep 12, 2026). Hospital outpatient labs typically bill around $550.00 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) | $186.99 | $192.99 | Includes the one $6 lab processing fee, charged once per order | | Quest Health (Quest Diagnostics' own site) | $142.00 | $142.00 | [list price checked 2026-09-12](https://www.questhealth.com/product/alcohol-blood-test-peth/12198M.html) | | Hospital outpatient lab, self-pay (typical) | $550.00 | $550.00 | Reference figure; hospital charges vary widely by facility and are often higher | Lab test codes: Labcorp test no. 791584. ## How do you prepare? No fasting required. A standard blood draw is performed. ## Related conditions - Substance use evaluation (Z13.89) ## Common questions about the PEth Alcohol Biomarker test ### How long do PEth Alcohol Biomarker results take? Most PEth Alcohol Biomarker results are available in 5–7 business days after your specimen arrives at the lab. You'll get an email the moment results are ready, with everything viewable in your TestWell portal. ### What sample is collected for the PEth Alcohol Biomarker? Blood draw. Sample is collected at a Quest, Labcorp, or BioReference patient service center near you, or via at-home phlebotomy where available. ### How much does the PEth Alcohol Biomarker cost without insurance? On TestWell, the PEth Alcohol Biomarker is $186.99. Quest Direct lists comparable tests at $249. Walk-in hospital labs typically bill $550 or more without insurance. Insurance is not required — pay one all-in price. ### Do I need to fast before the PEth Alcohol Biomarker? No fasting required for the PEth Alcohol Biomarker. No fasting required. A standard blood draw is performed. ### Where can I get the PEth Alcohol Biomarker done? The PEth Alcohol Biomarker is available at Labcorp patient service centers nationwide. Order online at TestWell, pick your preferred lab, and we'll generate a digital requisition for the location closest to you. ## How to order 1. Add to cart: https://www.test-well.com/cart?add=peth-alcohol-biomarker&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 Labcorp patient service center — no appointment needed at most sites. 5. Results post to your TestWell portal in 5–7 business days with reference ranges and flags. ## Related - [All Drug & Alcohol Screening tests](https://www.test-well.com/tests/category/drug-alcohol-screening) - [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/peth-alcohol-biomarker 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.