Cardio IQ Lipoprotein(a) (Lp(a)) Biomarker Testing
It measures lipoprotein(a), a largely inherited heart-risk particle; order through Vitals Vault and test at a nearby Quest location.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
Lipoprotein(a), written as Lp(a), is a cholesterol-carrying particle that can raise your risk for atherosclerosis even when your “standard” cholesterol numbers look fine. Unlike LDL cholesterol, your Lp(a) level is mostly set by genetics and tends to stay fairly stable over your lifetime.
A Cardio IQ Lipoprotein(a) test helps you answer a practical question: do you have an inherited risk factor that should change how aggressively you and your clinician manage overall cardiovascular risk? It is especially useful if you have a strong family history of early heart disease or stroke, or if you have had an unexpected cardiovascular event.
Your result is not a diagnosis by itself. It is one piece of risk information that is most helpful when you interpret it alongside other labs (like ApoB and LDL-C) and your personal history.
Do I need a Cardio IQ Lipoprotein(a) test?
You may want an Lp(a) test if heart disease, stroke, or aortic valve stenosis runs in your family, especially if events happened at a younger-than-expected age. Lp(a) is one of the most common inherited contributors to cardiovascular risk, and it is not captured by a basic lipid panel.
Testing can also be helpful if you have “normal” LDL cholesterol but you or your clinician still suspect higher risk based on imaging, symptoms, or other markers. For example, an elevated coronary artery calcium score, early plaque on ultrasound, or persistently high ApoB can prompt a closer look at Lp(a).
If you have already had a heart attack, stroke, transient ischemic attack (TIA), or peripheral artery disease, Lp(a) can help explain why risk was higher than expected and can support a more targeted prevention plan.
Because Lp(a) is largely genetic, many people only need to measure it once, unless your clinician recommends repeat testing for confirmation or to track major changes in health status or treatment strategy.
This is a laboratory blood test performed in a CLIA-certified lab; results should be interpreted with your clinician and are not a standalone diagnosis of cardiovascular disease.
Lab testing
Order labs to measure Lp(a)
Lipoprotein(a)
from $33.99 at Quest Diagnostics
About 1 week
Schedule online — results typically within a week
Clear next steps
Guidance included, with follow-up care available
HSA / FSA
Eligible for pre-tax health spending accounts
Get this test with Vitals Vault
Vitals Vault lets you order Cardio IQ Lipoprotein(a) testing directly and complete your blood draw at a nearby Quest location. You can use your result to have a more informed conversation with your clinician about inherited cardiovascular risk.
After your results post, PocketMD can help you translate the number into plain language, organize follow-up questions, and identify common companion labs that add context (such as ApoB, LDL-C, and hs-CRP). That way, you are not left guessing what to do next.
If you are building a longer-term prevention plan, you can also use Vitals Vault to recheck related markers over time so you can see trends rather than relying on a single snapshot.
- Order online and draw at a Quest location
- Clear, patient-friendly result context with PocketMD
- Easy reordering when you and your clinician want to trend labs
Key benefits of Cardio IQ Lipoprotein(a) testing
- Identifies an inherited cardiovascular risk factor that a standard lipid panel does not measure.
- Helps explain higher-than-expected risk when LDL-C looks “fine” but plaque or events occur.
- Supports more personalized LDL/ApoB targets when you and your clinician are choosing intensity of prevention.
- Improves family risk conversations because elevated Lp(a) often clusters in relatives.
- Adds context to decisions about imaging (like coronary calcium) and overall risk stratification.
- Helps you interpret other lipid markers more accurately, especially ApoB and non-HDL cholesterol.
- Creates a baseline you can reference in PocketMD when planning follow-up labs and next steps.
What is Cardio IQ Lipoprotein(a)?
Lipoprotein(a) is a lipoprotein particle that looks similar to LDL (“bad cholesterol”) but has an extra protein attached called apolipoprotein(a). That added component can make the particle more atherogenic, meaning it is more likely to contribute to plaque buildup in arteries.
Lp(a) is different from most cholesterol markers because your level is driven primarily by genetics. Diet, exercise, and weight changes usually have only modest effects on Lp(a), which is why testing can be valuable even if you already live a heart-healthy lifestyle.
Clinically, Lp(a) is used as a risk-enhancing factor. A higher Lp(a) level is associated with higher risk of atherosclerotic cardiovascular disease (ASCVD) and is also linked to calcific aortic valve disease in some people.
How Lp(a) relates to LDL, ApoB, and non-HDL cholesterol
Lp(a) carries cholesterol and contains ApoB, so it overlaps with other “atherogenic particle” measures. If your Lp(a) is high, your ApoB and non-HDL cholesterol may better reflect risk than LDL-C alone, because they capture particle burden more directly.
Why one measurement is often enough
Lp(a) is usually stable across adulthood. Many clinicians treat it as a “once-in-a-lifetime” measurement unless there is a reason to confirm the result, you are testing in a different unit method, or your care plan changes and you want a consistent baseline for your records.
What do my Cardio IQ Lipoprotein(a) results mean?
Low Lp(a) levels
A low Lp(a) result generally means this inherited risk factor is unlikely to be a major driver of your cardiovascular risk. It does not guarantee low risk overall, because blood pressure, diabetes, smoking history, ApoB/LDL particle burden, inflammation, and family history still matter. If you have symptoms or known plaque, your clinician may focus on other contributors.
Optimal (lower-risk) Lp(a) levels
An in-range or lower-risk Lp(a) level suggests Lp(a) is not significantly amplifying your baseline risk. In this situation, prevention typically centers on the factors you can change, such as lowering ApoB/LDL exposure over time, optimizing blood pressure, and addressing insulin resistance. Your clinician may still recommend imaging or additional labs if your personal or family history is concerning.
High Lp(a) levels
A high Lp(a) result means you likely have a genetically higher concentration of an atherogenic particle, which can raise lifetime risk for ASCVD and, in some people, aortic valve disease. Many clinicians respond by aiming for tighter control of other modifiable risks, especially ApoB/LDL-related markers, because that is where treatment has the strongest evidence. If your Lp(a) is markedly elevated or you have a personal history of cardiovascular events, your clinician may also discuss earlier or more frequent risk assessment and family screening.
Factors that influence Lp(a)
Genetics is the main driver, so your level often stays similar from test to test. Units and methods can vary by lab (some report mg/dL, others nmol/L), so it helps to compare results using the same lab method over time. Hormonal changes, major inflammatory states, kidney disease, and certain medications can shift levels modestly, which is one reason your clinician may interpret Lp(a) alongside your overall health context rather than as a standalone number.
What’s included
- Lipoprotein (A)
Similar tests to consider
Frequently Asked Questions
What is a “normal” or healthy Lp(a) level?
The cutoffs depend on the units and the lab method, so “normal” is best read using the reference information printed on your report. In general, lower is better for Lp(a), and higher values are treated as a risk-enhancing factor rather than a diagnosis. If you are comparing older and newer results, confirm whether they are reported in mg/dL or nmol/L before drawing conclusions.
Do I need to fast for an Lp(a) blood test?
Fasting is usually not required for Lp(a). However, Lp(a) is often ordered alongside other lipid markers that may be collected fasting depending on your clinician’s preference and the rest of your panel. If you are unsure, follow the collection instructions provided with your order.
How often should I retest Lp(a)?
Many people only need to test Lp(a) once because it is largely genetic and stable. Retesting can make sense if your first result was borderline and you want confirmation, if the lab method/units changed, or if your clinician wants a consistent baseline before making major prevention decisions.
Can diet and exercise lower Lp(a)?
Lifestyle changes are excellent for overall cardiovascular health, but they usually do not lower Lp(a) very much. The practical value of knowing your Lp(a) is that it can guide how aggressively you manage the risk factors you can change, such as ApoB/LDL exposure, blood pressure, and blood sugar.
Is Lp(a) the same thing as LDL cholesterol?
No. Lp(a) is an LDL-like particle with an additional protein (apolipoprotein(a)) attached. You can have a normal LDL-C and still have high Lp(a), which is why Lp(a) testing can uncover risk that a standard lipid panel misses.
Should my family members get tested if my Lp(a) is high?
Often, yes—especially first-degree relatives—because Lp(a) is strongly inherited. Family testing can identify who may benefit from earlier risk assessment and more proactive prevention. Your clinician can help decide who to test and when based on age and overall risk.