Cardio IQ® Apolipoprotein B (ApoB) Test
The Cardio IQ Apolipoprotein B test measures apolipoprotein B, or ApoB, in a blood serum sample. Quest describes ApoB as a strong indicator of coronary artery disease, useful even in people whose LDL cholesterol levels appear normal.
About this test
Apolipoprotein B is a protein component of certain lipoprotein particles, and Quest describes it as a powerful indicator of coronary artery disease, one that can add information beyond a standard LDL cholesterol result. This is especially relevant, Quest notes, in people where LDL cholesterol looks normal despite an elevated cardiovascular risk.
Because ApoB reflects the number of certain lipoprotein particles rather than only their cholesterol content, clinicians sometimes read it alongside standard lipid results such as total cholesterol and LDL cholesterol to get a fuller picture of cardiovascular risk.
Who might consider this test?
- ApoB is one additional marker clinicians may weigh alongside the rest of a lipid picture rather than in place of it.
Test details
| Quest code | 91726 |
|---|---|
| Methodology | Immunoturbidimetric |
| Sample type | 1 mL serum |
| Collection | Quest patient service center |
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Additional details
What this test looks at
The test reports the concentration of apolipoprotein B in a serum sample. Quest lists it under several names, including ApoB and Apolipoprotein B, Cardio IQ, all referring to the same measurement.
Order online and a physician order is included — no doctor's visit and no insurance needed. Your sample is collected at a Quest Diagnostics patient service center.
Laboratory results should always be interpreted by a licensed clinician who knows your health history. This page is information about a test, not medical advice.
Frequently asked questions
What does this test measure?
It measures the concentration of apolipoprotein B (ApoB) in a blood serum sample, using an immunoturbidimetric method.
How is the sample collected?
Through a routine blood draw; the test uses a serum sample collected at a Quest Diagnostics patient service center.
Do I need to prepare for this test?
No preparation instructions are listed for this test, though people follow any instructions their ordering clinician provides.
Why would ApoB be checked if LDL cholesterol looks normal?
Quest describes ApoB as a strong indicator of coronary artery disease that can add information even when LDL cholesterol levels appear normal, which is one reason a clinician may look at it alongside standard lipid results.
How much does the Cardio IQ APO B test cost?
The cash price at Celio Health is $49. That covers the physician's order and sample collection at a Quest patient service center — no insurance is needed and there's no separate doctor's visit to pay for.