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Lab test

Cardio IQ Myeloperoxidase (MPO) Test

This test measures myeloperoxidase (MPO), an enzyme, in a plasma sample. Quest describes it as used in evaluating individuals with multiple risk factors for cardiovascular disease, or those who already have established cardiovascular disease.

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About this test

Quest describes this test as measuring the amount of myeloperoxidase (MPO) present in a plasma sample, with results obtained through a turbidimetric immunoassay method. The blood sample is collected in an EDTA (lavender-top) tube, and the plasma portion is analyzed for MPO.

This test may be used in evaluating individuals with multiple risk factors for cardiovascular disease, or in those who already have established cardiovascular disease. As a single marker, an MPO result is read together with a person's other cardiovascular risk factors and history rather than on its own.

Test details

CollectionQuest patient service center

Quest resources

Additional details

What this test looks at

The test reports one value: the level of myeloperoxidase in plasma, measured by turbidimetric immunoassay. It is marketed under the Cardio IQ name as part of a cardiovascular-focused test line, alongside other markers used in evaluating cardiovascular disease risk.

How it's often used alongside other tests

Because MPO is described as a marker for people with cardiovascular risk factors or established disease, it is typically read together with the rest of a person's cardiovascular workup rather than as a stand-alone number.

This test isn't part of the Celio Health store at the moment, so it can't be ordered or requested here. The test menu lists everything that can.

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 myeloperoxidase (MPO), an enzyme, in a plasma sample, using a turbidimetric immunoassay method.

How is the sample collected?

The test uses a 1 mL plasma sample collected in an EDTA (lavender-top) tube.

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.

Who might have this test measured?

Quest describes it as used in evaluating individuals with multiple risk factors for cardiovascular disease, or those who already have established cardiovascular disease.

Last updated 2026-09-18 · How we write about lab testing

Educational content

This page is for general educational purposes only. It is not medical advice, and it is not a substitute for consultation with a qualified healthcare professional. Laboratory results should always be interpreted by a licensed clinician who knows your health history. If you have questions about your health or your results, talk with your doctor. If you think you may be experiencing a medical emergency, call 911.