Myeloperoxidase levels: what's normal, high and low
An enzyme released by activated white blood cells inside inflamed artery walls. Elevated MPO indicates active vascular inflammation and has been associated with plaque more prone to rupture.
Medically reviewed by Youmna DiStefano, MD · Last reviewed October 2026
The short answer
Myeloperoxidase is measured with a standard blood draw; no fasting is needed. A typical reference range is 0.000 – 470 pmol/L. At TestWell it's $44.99 all-in as Myeloperoxidase (MPO), results in 3–5 business days, drawn at Quest. An out-of-range result is a prompt to look closer, not a diagnosis.
- Units
- pmol/L
- Sample
- Blood draw
- Fasting
- Not required
- Results
- 3–5 business days
- Price
- $44.99
- Labs
- Quest
Myeloperoxidase Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 0.000 – 470 pmol/L |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
Have a result in hand? analyze it with your AI assistant using these reviewed ranges, or run it through our explainer. Tools: look up another marker's range · convert lab units
What your Myeloperoxidase result may mean
Suggests active arterial inflammation; interpreted alongside hs-CRP, ApoB, Lp(a) and lipoprotein particles rather than alone.
Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
How do you get a Myeloperoxidase test?
Order online, a licensed physician reviews the requisition, and you walk into a nearby lab for the draw. Myeloperoxidase is available on its own or inside these panels — panels cost less per marker when you want the fuller picture.
| Option | Includes | Price |
|---|---|---|
| Myeloperoxidase (MPO) | This marker only | $44.99 |
| Men's Total Body Advanced Panel | 65 tests | $999.99 |
| Women's Total Body Advanced Panel | 65 tests | $999.99 |
Quest vs. Labcorp for Myeloperoxidase: which lab should you pick?
Both are CLIA-certified national labs and the result is clinically equivalent, so pick whichever location is closer. Your report will print that lab's own reference range, which can differ slightly from the table above.
| Lab | Available | Price |
|---|---|---|
| Quest Diagnostics | Yes | $44.99 |
| Labcorp | No | — |
| BioReference (NY & NJ) | No | — |
Need help choosing a location? Use the lab finder to see draw sites near your ZIP.
Related Heart Health biomarkers
Markers commonly tested alongside Myeloperoxidase.
Frequently asked
What does a high Myeloperoxidase mean?
Suggests active arterial inflammation; interpreted alongside hs-CRP, ApoB, Lp(a) and lipoprotein particles rather than alone. A single result above the reference range is a prompt to look closer with a clinician — often a repeat test and related markers — not a diagnosis on its own.
Do I need a doctor's order to test my myeloperoxidase?
No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor.
How long does it take to get Myeloperoxidase results?
Most Myeloperoxidase results are available in 1–3 business days after your specimen arrives at the lab. You'll get an email the moment your results are ready, with everything viewable in your TestWell portal.
How much does a Myeloperoxidase test cost?
Our Myeloperoxidase (MPO) starts at $44.99. That's the all-in price — no copays, no insurance hoops, no surprise bills. HSA and FSA cards are accepted.
Do I need to fast before my Myeloperoxidase test?
Fasting is not required for the Myeloperoxidase test. You can have your blood drawn any time of day.
Which lab will process my Myeloperoxidase test?
Your test will be processed by Quest Diagnostics, Labcorp, or BioReference depending on which is closest to you and which lab carries the test. All three are CLIA-certified and trusted by hospitals nationwide. You'll choose your lab during checkout from 4,000+ locations.
Ready to test your myeloperoxidase?
Order in two minutes, get physician-approved, and visit a lab the same day. Starts at $44.99.