Also known as: PEth Alcohol Biomarker
On your lab requisition: Labcorp “Phosphatidylethanol (PEth)” (test no. 791584)
The short answer
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 processing 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.
Hospital Lab
$550
cash pay
Other Labs
$249
+ lab fees
TestWell
$186.99
+ $6 lab processing fee
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.
Drug and alcohol screening detects recent or chronic substance use for clinical, occupational, or personal monitoring purposes.
Patients being evaluated for substance use, employers requiring confirmation testing, and individuals self-monitoring recovery.
Sample Type
Blood draw
Fasting
Not required
Results In
5–7 business days · typical; varies by lab and draw day
Performed At
Labcorp
1 biomarker tested
Your PEth Alcohol Biomarker 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 5–7 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. Already have results? Analyze them with your AI assistant against our physician-reviewed ranges.
No fasting required. A standard blood draw is performed.
TestWell orders the same PEth Alcohol Biomarker the labs run for doctors' offices, so you can walk into Labcorp with our requisition — no doctor's visit, a licensed physician authorizes the order, and most patient service centers take walk-ins. The table shows each lab's own test code, the name printed on the requisition, what the lab charges on its own consumer site, and the price through TestWell at that lab (plus one $6 fee per order).
| Lab | Test code | On the requisition | Lab's own site | Through TestWell |
|---|---|---|---|---|
| Labcorp | test no. 791584 | “Phosphatidylethanol (PEth)” | not sold direct | $186.99 + $6 |
You choose the lab at checkout; the requisition is written for that lab and arrives by email within minutes. New York and New Jersey orders draw at BioReference. Lab-direct prices are read from the labs' public pages and re-checked regularly.
Where to get it near you: patient service centers by state and city · search by ZIP code
A PEth Alcohol Biomarker test costs $186.99 at TestWell — $192.99 all-in, since the $6 lab processing fee is charged once per order and there is no draw or physician fee. The labs' own sites list the same test at $142.00 at Quest Health (checked Oct 21, 2026). Hospital outpatient labs typically bill around $550.00 self-pay. With insurance you pay your plan's negotiated rate against your deductible; TestWell's price is fixed before the draw and HSA/FSA-eligible.
| Where you order | Price | One test, all-in | Notes |
|---|---|---|---|
| TestWell (drawn at 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 Oct 21, 2026 |
| 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. 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
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.
Blood draw. A standard venous blood draw, collected at any Quest, Labcorp or BioReference patient service center — walk in with the requisition we email you, no appointment needed at most locations.
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.
No fasting required for the PEth Alcohol Biomarker. No fasting required. A standard blood draw is performed.
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.
Ordered directly, a PEth Alcohol Biomarker test lists at $142.00 at Quest Health (Quest Diagnostics' own site) (prices checked October 2026). TestWell orders the same test at the same Labcorp patient service centers for $186.99 — $192.99 all-in with the $6 per-order lab processing fee — paid out of pocket at checkout with no insurance, doctor's visit or draw fee; HSA and FSA cards are accepted.
The PEth Alcohol Biomarker test is Labcorp test number 791584 ("Phosphatidylethanol (PEth)"). TestWell orders it under that code for $186.99 at Labcorp — no doctor's visit or insurance required, results in 5–7 business days. Codes verified against the labs' catalogs in 2026.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
TestWell Price
$186.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
Frequently ordered together
Customers who ordered PEth Alcohol Biomarker also added these for a more complete health picture.
Not sure where to start?
PEth Alcohol Biomarker
$186.99