A lipoprotein(a) test is a simple blood draw; fasting isn’t needed, and results come in mg/dL or nmol/L to flag inherited lipoprotein a risk.
If you’ve heard about lipoprotein(a)—often written as Lp(a)—you’ve likely heard two things: it’s inherited, and it can raise heart and stroke risk. This page shows exactly how to get tested, what to ask for at the lab, how to read the report, and what to do next.
How To Test For Lipoprotein A: Step-By-Step
Here’s a clean, no-nonsense path from idea to result. If you want a straight answer on how to test for lipoprotein a, follow these steps and you’ll have usable numbers in days, not weeks.
- Ask for the test by name. Say “lipoprotein(a) blood test” or “Lp(a).” It’s not part of a routine lipid panel, so the clinician or lab may need to order it separately.
- Request results in nmol/L when possible. That unit counts particles. Many experts prefer it because it avoids some assay quirks. If your lab reports mg/dL, that’s fine—just don’t try to convert between the two with a single formula.
- No special prep. Lp(a) barely changes with meals. You can test any time of day. If other fasting labs are ordered, follow those fasting rules and get Lp(a) at the same draw.
- Use a mainstream lab. Hospital labs, national chains, and many cardiac clinics run Lp(a) with standard immunoassays. Turnaround is usually 1–3 days.
- Keep the report. Lp(a) is largely stable across life. You’ll likely need the number only once, unless a clinician asks for a repeat in special settings.
- Plan next steps with the whole picture. Your Lp(a) number doesn’t stand alone. Pair it with LDL-C, blood pressure, age, family history, and smoking status to set a plan.
Lipoprotein A Test At A Glance
| Item | What It Means | Quick Tip |
|---|---|---|
| Test Type | Blood test that measures Lp(a) particles or mass | Ask for an immunoassay; nmol/L reporting is preferred in many labs |
| Prep | No fasting needed for Lp(a) alone | Fast only if you’re doing a full lipid panel at the same time |
| Units | Reported as nmol/L (particles) or mg/dL (mass) | Don’t use a single conversion between mg/dL and nmol/L |
| Turnaround | Typically 1–3 business days | Digital portals make it easy to grab the PDF report |
| Who Orders | Primary care, cardiology, lipid clinic, or direct-to-consumer lab | Bring a short note: “Please order lipoprotein(a)” |
| How Often | Usually once in adulthood unless risk or treatment plan changes | Repeat only if your clinician says it will change care |
| Why It Matters | High Lp(a) raises risk of heart disease, stroke, and aortic valve disease | Use the result to fine-tune LDL-C targets and other risk steps |
Lipoprotein A Testing: Who Needs It And When
Most adults benefit from at least one Lp(a) check in their lifetime, especially if there’s early heart disease in the family, high LDL-C, or repeat events in spite of standard care. Major cardiology groups endorse a once-in-a-lifetime approach for people with raised risk, with earlier or broader screening supported by several societies.
Two practical signals that you should ask for Lp(a) now: a parent or sibling with heart attack or stroke at a young age, or you’ve had a cardiac event even though your LDL-C looks fine. In both cases, an elevated Lp(a) can explain part of the risk and push your care team to tighten LDL-C targets or add therapies.
What The Numbers Look Like On Paper
Reports list a single value with a unit. Many labs use nmol/L; some still use mg/dL. Commonly used cutoffs treat ≥50 mg/dL or ≥125 nmol/L as a risk-enhancing level. Values well below those ranges are usually labeled normal. Because the mass of Lp(a) varies with isoform size, there’s no fixed mg/dL-to-nmol/L conversion that works for everyone.
Do You Need To Fast?
No. Lp(a) is genetic and hardly budges with meals, so you can book a draw at any time. If you’re pairing the test with a lipid panel that your clinician wants fasting, go in the morning and stick to water beforehand.
How To Read And Use Your Lp(a) Result
Think of Lp(a) as a “risk flag.” A high number doesn’t diagnose disease, but it can explain why risk calculators underestimate your odds and why aggressive LDL-C lowering makes sense for you. Here’s how to put the figure to work.
Pair It With Your Other Risk Markers
- LDL-C: The lower, the better when Lp(a) runs high. Your clinician may aim for tighter LDL-C goals or add therapy.
- Blood pressure and diabetes: Keeping these in range cuts risk that Lp(a) can amplify.
- Smoking: If you smoke, quitting moves the needle more than any supplement.
When To Repeat The Test
Most people only need one measurement. A repeat may be useful if the first test was drawn during acute illness, pregnancy, kidney flare, or after starting a therapy known to shift Lp(a). Your clinician will guide timing if a recheck helps a decision.
How To Get The Test Ordered
You’ve got options. The simplest path is to ask your primary care clinician or cardiologist. Many national labs also sell an Lp(a) add-on without a clinic visit. If you go that route, share the result with your clinician so it’s part of your chart and plan.
What To Say Or Write
Use plain language: “I’d like a lipoprotein(a) blood test. Please report in nmol/L if available.” Bring a short list of why you’re asking—family history, early disease, or recent events.
Cost And Coverage
Pricing varies by lab, but the CPT code is 83695. Many insurers cover an Lp(a) test when there’s a medical reason, such as family history or risk refinement.
Common Thresholds And What They Mean
| Result (mg/dL | nmol/L) | How Labs Describe It | What You Can Do Next |
|---|---|---|
| <30 mg/dL | <75 nmol/L | Usually normal | Keep routine risk checks and healthy habits |
| 30–50 mg/dL | 75–125 nmol/L | Intermediate range | Look at the whole risk picture; refine LDL-C target with your clinician |
| ≥50 mg/dL | ≥125 nmol/L | Risk-enhancing | Plan tighter LDL-C goals; consider therapy add-ons as indicated |
Treatment Landscape: What Changes After A High Result
There isn’t a widely available, Lp(a)-specific pill yet. That said, a high reading often changes the LDL-C goal and can nudge therapy choices. PCSK9 inhibitors, for instance, lower LDL-C a lot and also trim Lp(a) by about a quarter on average. Niacin lowers Lp(a) on paper but hasn’t shown outcome gains and brings side effects, so it’s rarely used for this purpose. Apheresis is reserved for select, very high-risk cases. Several targeted drugs are in late-stage trials, and the first outcome readouts are pending. Your day-to-day move after a high test is simple: lock down LDL-C and other risks with your care team.
Practical Moves You Can Make Right Away
- Ask for a clear LDL-C goal. Many people with high Lp(a) aim lower than standard targets.
- Take prescribed meds consistently. Statins don’t lower Lp(a), but they cut events by lowering LDL-C. PCSK9 inhibitors can be added when needed.
- Dial in daily habits. Diet patterns rich in plants, regular activity, and no tobacco still pay off, even though they don’t move Lp(a) much.
- Loop in first-degree relatives. Family members may want a one-time test too.
Sample Timeline: From Order To Action
Week 0
Visit, message, or telehealth request for “lipoprotein(a) blood test,” add fasting lipid panel if your clinician wants it.
Week 1
Draw blood, any time of day unless you’re fasting for other labs.
Week 1–2
Review your Lp(a) value with the rest of your labs. If it’s ≥50 mg/dL or ≥125 nmol/L, set lower LDL-C targets and update the plan. If it’s normal, you’re done unless risk changes later.
Answers To The Most Common “What Ifs”
What If My Lab Only Reports mg/dL?
No problem. Just don’t try to convert it to nmol/L with a single ratio. The relationship varies by person. Keep the value as is and use the mg/dL thresholds.
What If I’m Sick On Test Day?
Acute illness, kidney flare, or hormone shifts can nudge Lp(a). If your number looks off and you were unwell, ask if a repeat makes sense when you’re back to baseline.
What If My Number Is Sky-High?
Bring the result to a lipid clinic or cardiology visit. You may qualify for more aggressive LDL-C lowering, combination therapy, or rare-case apheresis. Family members may be candidates for testing too.
Why This Test Isn’t Just “Another Cholesterol Number”
Lp(a) is carried on an LDL-like particle with an extra protein called apo(a). That shape makes the particle atherogenic and pro-clotting. Because Lp(a) is mostly set by genes, lifestyle changes won’t drop the value much, which is why the single test is so useful: it tells you whether a genetic factor is in play and whether the rest of your prevention plan should be tighter.
Placing This Page Into Action
If you want a no-mess plan for how to test for lipoprotein a, keep it short: request the test, ask for nmol/L if available, don’t fast unless the rest of your labs require it, and file the result where your care team can see it. If the number is high, use it to turn the screws on LDL-C and the rest of your risk plan.
Helpful References
For clinical cutoffs, units, and once-in-a-lifetime screening guidance, see the American College of Cardiology’s summary of Lp(a) testing recommendations (ACC guideline notes). For a clear plain-language overview of what Lp(a) is and why it matters, the U.S. Centers for Disease Control and Prevention offers a concise explainer (CDC Lp(a) page).