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C-Reactive Protein (CRP)

  • CLIA Certified Labs
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Doctors use this test to check for infection, inflammation.

  • Sample Type: Blood
  • Results: 2-7 days
  • Age: 18+

A C-Reactive Protein (CRP) Quantitative test is used to aid in the diagnosis of infections or diseases which cause inflammation. CRP is a protein produced by the liver. Higher than normal concentrations of CRP are often an indicator of infection or inflammation in the body. This test can help determine if an infection is present but not the source of the infection. Condition which can cause elevated CRP levels include but are not limited to Sepsis, Pelvic Inflammatory Disease, Arthritis, Lupus, Vasculitis, and Inflammatory Bowel Disease.

C-Reactive protein levels are often higher in people who have recently had a heart attack. This test may be used to help determine if a person has had a recent cardiac event.

No special preparation is required.

Quest test codes: 4420


+$15 service fee

Price does not include the Physician Service Fee ($6) and the Lab Collection Fee ($9). These non-refundable fees cover the ordering and oversight of lab tests and follow-up services when appropriate.

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Provided by Quest Diagnostics
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How does it work?

  • Order Tests Online

    No doctor visit required for purchase. Choose from a wide range of panels and tests. Pay online with a credit or debit card — no insurance needed.
  • Go to the Lab for Sample Collection

    Complete your test sample collection during your scheduled appointment.
  • Get Fast Results Online

    We will email you when your results are ready. Access your Confidential Lab Record by logging in to your account. There you can view, save and print your results.

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Frequently Asked Questions

CRP is produced by the liver, but abnormal levels of the protein are associated with inflammation, heart attack, and stroke. The CRP Quantitative Blood Test can also be used to screen for inflammation due to infection, and is often ordered in conjunction with other heart health tests. Oral contraceptives, menstruation, and pregnancy may affect CRP levels, so women may need to discuss the best time to take this test with their provider. There are no fasting requirements for this test.

Your provider may order a C-Reactive Protein Quantitative Blood Test to diagnose heart disease or stroke, or determine if inflammation is present. It can also be used to monitor treatment for inflammatory diseases or infection, and whether or not your levels of CRP decrease with certain medications. 

Your provider may wish to order a C-Reactive Protein Quantitative Blood Test if you have a history of heart disease or stroke in your family, even if you have not exhibited symptoms of either. It's a way for your provider to help you set a baseline for your health and monitor changes over time. 

You cannot take this C-Reactive Protein Quantitative Blood Test at home — this test can only be administered by a medical professional at a licensed testing facility. 

Once you receive the results of your blood test for CRP, you will need to consult with your provider. Only a medical professional can advise you on your CRP levels and help you develop a treatment plan if necessary. 

Pregnancy and menstruation may make CRP levels higher than normal. Let your provider know if you take any hormone-based contraceptives, which may also impact CRP levels. CRP generally increases a little with age. 

There are no special requirements for the C-Reactive Protein Quantitative Blood Test. Your provider will draw a blood sample from a vein in your arm. C-Reactive Protein Quantitative Blood Test results typically take 3-5 business days to process. 

The cost of a C-Reactive Protein Quantitative Blood Test listed on Tripment Health is transparent and final — you will never be asked to pay additional fees at the testing facility, or receive a surprise bill down the road. 

Tripment Health has partnered with nearly 7,000 lab test facilities across 48 states. Finding a C-Reactive Protein Quantitative Blood Test, current procedural technology (cpt) code 4420, is easier than ever. Add the lab tests you need to your cart, then select a testing facility conveniently close to you.