On your lab requisition: Quest “OmegaCheck” (test code 92701)Labcorp “Fatty Acid Balance” (test no. 835040)
The short answer
Omega-3 Index measures Omega-3 Index (%), EPA and DHA plus 2 more from a standard blood draw. At TestWell it costs $69.99 plus a $6 lab processing fee, needs no fasting, and results post in 7–10 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp.
Hospital Lab
$250
cash pay
Other Labs
$90
+ lab fees
TestWell
$69.99
+ $6 lab processing fee
The Omega-3 Index measures the percentage of EPA and DHA omega-3 fatty acids in your red blood cell membranes. Unlike a simple blood level, the index reflects your average omega-3 intake over the past 2–3 months. An index of 8% or higher is associated with the lowest cardiovascular risk, while below 4% is considered high-risk. Low omega-3 levels are linked to inflammation, depression, cognitive decline, and increased risk of sudden cardiac death.
RBC membrane EPA + DHA expressed as % of total fatty acids. Sustained omega-3 index ≥8% is associated with the lowest cardiovascular and all-cause mortality risk in long-term studies.
Anyone optimizing cardiovascular risk beyond standard lipid management, fish-oil supplement users wanting to verify absorption/dose, athletes monitoring recovery markers, or pregnant women optimizing DHA for fetal brain development.
Sample Type
Blood draw
Fasting
Not required
Results In
7–10 business days
Performed At
Quest or Labcorp
5 biomarkers tested · 2 measured, 3 calculated from them
Your Omega-3 Index results will include values for each of the 5 biomarkers 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 7–10 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. Do not take fish oil supplements for 48 hours before testing for a baseline reading.
An Omega-3 Index test costs $69.99 at TestWell — $75.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. Hospital outpatient labs typically bill around $250.00 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) | $69.99 | $75.99 | Includes the one $6 lab processing fee, charged once per order |
| TestWell (drawn at Labcorp) | $109.99 | $115.99 | Labcorp's own cost for this test is higher; same order, same portal, same physician review |
| Hospital outpatient lab, self-pay (typical) | $250.00 | $250.00 | Reference figure; hospital charges vary widely by facility and are often higher |
Lab test codes: Quest test code 92701 · Labcorp test no. 835040. 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
≥8% is the target (associated with lowest cardiovascular mortality). 4-8% is intermediate; <4% is high risk. Average American: 4-5%. Japanese population (where the original studies were done): 7-9%.
TestWell charges $69.99 — vs $99 retail from OmegaQuant (the original lab). Quest and Labcorp don't run this test in-house.
No fasting required. Take supplements as usual — the test measures long-term incorporation into RBC membranes, not recent intake.
Every 3-4 months when changing supplement dose or starting/stopping fish oil — RBC turnover is ~120 days, so it takes that long to see a stable new baseline. Annually for maintenance once optimized.
Highly variable — depends on baseline, body weight, EPA/DHA ratio in the supplement, and genetics. Most people need 1500-3000 mg combined EPA+DHA daily to move from 4% baseline to 8% over 3-4 months. Retest to verify.
Omega-3 Index test results are typically ready in 7–10 business days after your draw at Quest or Labcorp. TestWell emails you the moment they post, and your results dashboard shows each marker against its reference range with a plain-English explanation.
Order the Omega-3 Index test online from TestWell for $69.99 (plus a $6 per-order lab processing fee) — no doctor's visit, referral or insurance needed. A licensed physician authorizes the order, then you walk into any Quest or Labcorp patient service center near you for the draw (the lab locator on our site lists the closest ones by ZIP code), and results arrive in 7–10 business days.
The Omega-3 Index test is Quest Diagnostics test code 92701 ("OmegaCheck"), Labcorp test number 835040 ("Fatty Acid Balance"). TestWell orders it under those codes for $69.99 at Quest or Labcorp — no doctor's visit or insurance required, results in 7–10 business days. Codes verified against the labs' catalogs in 2026.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
TestWell Price
$69.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
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Omega-3 Index
$69.99