Also known as: Apolipoprotein B, ApoB
On your lab requisition: Quest “Apolipoprotein B” (test code 5224)Labcorp “Apolipoprotein B” (test no. 167015)BioReference “Apolipoprotein B (Apo B)” (test code 0457-2)
The short answer
Measures ApoB — considered by many cardiologists to be the single best predictor of cardiovascular risk, measured from a standard blood draw. At TestWell it costs $30.99 plus a $6 lab processing fee, needs no fasting, and results post in 2–4 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp.
Hospital Lab
$120
cash pay
Other Labs
$45
+ lab fees
TestWell
$30.99
+ $6 lab processing fee
Apolipoprotein B (ApoB) is the primary protein found on LDL and other atherogenic (artery-clogging) lipoprotein particles. Many cardiologists now consider ApoB to be a better predictor of cardiovascular risk than LDL cholesterol because it directly measures the number of potentially harmful particles in your blood.
Apolipoprotein B counts the number of atherogenic particles in your blood — many cardiologists consider it the single best predictor of heart-attack risk, ahead of LDL.
Anyone doing a serious cardiovascular risk workup, people with normal LDL but family history of heart disease, anyone on a longevity protocol or statin therapy.
Sample Type
Blood draw
Fasting
Not required
Results In
2–4 business days
Performed At
Quest or Labcorp
Your ApoB — Heart Attack Risk Predictor 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 2–4 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.
Fasting is not required but may improve accuracy. No special preparation needed.
An ApoB — Heart Attack Risk Predictor test costs $30.99 at TestWell — $36.99 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 $69.00 at Labcorp OnDemand (list prices checked Sep 12, 2026). Hospital outpatient labs typically bill around $120.00 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) | $30.99 | $36.99 | Includes the one $6 lab processing fee, charged once per order |
| TestWell (drawn at Labcorp) | $39.99 | $45.99 | Labcorp's own cost for this test is higher; same order, same portal, same physician review |
| TestWell (drawn at BioReference — New York & New Jersey) | $31.99 | $37.99 | New York and New Jersey orders route to BioReference; Quest Health and Labcorp OnDemand don't take self-ordered draws in those states |
| Labcorp OnDemand (Labcorp's own site) | $69.00 | $69.00 | list price checked Sep 12, 2026 |
| Hospital outpatient lab, self-pay (typical) | $120.00 | $120.00 | Reference figure; hospital charges vary widely by facility and are often higher |
46% less than the lower lab-direct list price, for the same draw at the same lab. Lab test codes: Quest test code 5224 · Labcorp test no. 167015 · BioReference code 0457-2. 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
LDL measures cholesterol mass; ApoB counts the actual atherogenic particles. Each LDL, VLDL, IDL, and Lp(a) particle carries exactly one ApoB. Two people can have the same LDL but very different particle counts — and particle count drives cardiovascular risk. This is why the European Society of Cardiology now lists ApoB as the preferred risk marker.
Under 90 mg/dL for low-risk adults, under 80 for those with cardiovascular risk factors (diabetes, hypertension, smoking), under 65-60 for established heart disease per recent expert consensus (Sniderman, Brown, Allan). Optimal for longevity: under 80.
ApoB (mg/dL) / LDL (mg/dL) of about 0.8 means typical particle size. Higher ratio (>0.9) means smaller, denser, more atherogenic particles — even at the same LDL. People on low-carb diets sometimes have normal LDL but elevated ApoB; the ratio catches this.
On TestWell, ApoB is $30.99. Quest Direct lists the same test at $45, walk-in hospital labs typically bill $100-120 without insurance. Same CLIA-certified labs, same biomarker — TestWell just removes the markup.
The CPT code for Apolipoprotein B is 82172. Often ordered alongside ApoA1 (also 82172) and Lp(a) (83695) in a complete cardio risk panel.
Yes — 9-12 hour fast (water only). Unlike LDL, ApoB is less affected by recent meals, but most clinicians still recommend fasting since it's usually drawn alongside a lipid panel and triglycerides.
Yes if you're serious about heart risk assessment. The Heart Health Panel bundles ApoB + Lipid Panel + hs-CRP + Lp(a) at a discount. ApoB plus Lp(a) covers >95% of genetic cardiovascular risk.
Ordered directly, an ApoB — Heart Attack Risk Predictor test lists at $69.00 at Labcorp OnDemand (prices checked September 2026). TestWell orders the same test at the same Quest or Labcorp patient service centers for $30.99 — $36.99 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.
ApoB — Heart Attack Risk Predictor test results are typically ready in 2–4 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 ApoB — Heart Attack Risk Predictor test online from TestWell for $30.99 (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 2–4 business days.
The ApoB — Heart Attack Risk Predictor test is Quest Diagnostics test code 5224 ("Apolipoprotein B"), Labcorp test number 167015 ("Apolipoprotein B"), BioReference code 0457-2 ("Apolipoprotein B (Apo B)") (CPT 82172). TestWell orders it under those codes for $30.99 at Quest, Labcorp or BioReference — no doctor's visit or insurance required, results in 2–4 business days. Codes verified against the labs' catalogs in 2026.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
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Better value: the Heart Health Panel
Save $47.96This test is part of the Heart Health Panel — 5 tests · 8 biomarkers for $99.99, $47.96 less than à la carte.
$99.99$147.95
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ApoB — Heart Attack Risk Predictor
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