High-Sensitivity CRP (hs-CRP)
High-sensitivity C-reactive protein (hs-CRP) measures low-grade inflammation levels to assess cardiovascular disease risk and identify inflammatory conditions.
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This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
What this test measures
High-sensitivity C-reactive protein (hs-CRP) is a blood marker that detects very low levels of CRP, a protein the liver produces when inflammation is present. Standard CRP tests are designed to flag acute inflammatory events like severe infections; the high-sensitivity version is calibrated to measure the subtle, chronic inflammation that accumulates silently in artery walls and contributes to cardiovascular disease.
Research has established that hs-CRP is an independent predictor of cardiovascular events, including heart attack, stroke, peripheral vascular disease, and sudden cardiac death, even among individuals with no prior history of heart disease. Studies suggest that hs-CRP may be a stronger overall predictor of these events than LDL cholesterol, because it captures the inflammatory component of atherosclerosis that cholesterol testing misses. This makes hs-CRP a valuable addition to standard lipid screening for individuals and healthcare providers seeking a more comprehensive assessment of cardiovascular risk.
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Individuals with intermediate cardiovascular risk (10-20% risk of heart attack in next 10 years) who may benefit from additional risk stratification beyond traditional cholesterol screening.
- People with borderline cholesterol levels or normal cholesterol who want to assess their cardiovascular risk through inflammatory markers.
- Those with family history of heart disease who are seeking comprehensive cardiovascular risk assessment to guide preventive care decisions.
- Individuals with metabolic syndrome, diabetes, or other conditions associated with chronic low-grade inflammation who need cardiovascular risk evaluation.
- Adults over 40 considering statin therapy or other cardiovascular prevention strategies who want additional risk information to guide treatment decisions.
- People monitoring the effectiveness of anti-inflammatory lifestyle changes such as diet modifications, exercise programs, or weight loss efforts.
- Individuals with autoimmune conditions or chronic inflammatory diseases who need to assess their cardiovascular risk associated with systemic inflammation.
What to expect
Preparation
No fasting is required for hs-CRP testing. However, testing should be avoided during acute illness, infection, recent injury, or surgery as these conditions can temporarily elevate CRP levels. For cardiovascular risk assessment, testing should be performed when individuals are in a stable, healthy state.
Sample Type
The test requires a simple blood draw, typically from a vein in the arm. The blood sample collection takes just a few minutes and involves minimal discomfort.
Collection
At the lab location, a trained phlebotomist will clean the injection site, insert a small needle to draw blood into a collection tube, and apply a bandage. The entire process typically takes less than 10 minutes.
Turnaround
Results are typically available within 1-3 business days after sample collection. Results will be accessible through your secure online portal with no doctor visit required.
Understanding your results
Results are interpreted using established cardiovascular risk categories: below 1.0 mg/L indicates lower risk, 1.0 to 3.0 mg/L indicates moderate risk, and above 3.0 mg/L suggests higher risk. Because hs-CRP can spike temporarily from a recent infection, dental procedure, or minor injury, clinical guidelines recommend averaging two measurements taken at least two weeks apart to establish a reliable baseline. A persistent elevation in the moderate- or high-risk range, when combined with other cardiovascular risk factors, may inform decisions about preventive interventions. Healthcare providers evaluate hs-CRP alongside lipid levels, blood pressure, family history, and lifestyle factors.
| Population | Reference Range | Notes |
|---|---|---|
| Adults (Cardiovascular Risk Assessment) | <1.0 mg/L = Low risk, 1.0-3.0 mg/L = Moderate risk, >3.0 mg/L = High risk | These ranges specifically apply to cardiovascular risk stratification in stable individuals |
| Adults (Acute Inflammation Detection) | >10.0 mg/L typically indicates acute inflammation or infection | Very high levels suggest ongoing acute inflammatory process rather than cardiovascular risk |
Reference ranges may vary by laboratory and individual factors. Results should be interpreted by a healthcare provider in the context of your overall health.
What does a “Low” result mean?
Low hs-CRP levels (<1.0 mg/L) are generally considered desirable and reflect low overall cardiovascular risk. Since normal CRP levels are generally less than 0.9 mg/dL, there is no clinically significant "low" level. Consistently low levels in healthy individuals indicate minimal systemic inflammation and lower risk for cardiovascular events. However, hs-CRP should be interpreted alongside other cardiovascular risk factors rather than used in isolation for risk assessment.
What does a “High” result mean?
Elevated hs-CRP levels (≥2-3 mg/L) are associated with increased risk of heart attack, stroke, and other cardiovascular events. Research shows that CRP levels above 2.4 mg/L are associated with doubled risk of coronary events compared to levels below 1 mg/L. Very high levels (>10 mg/L) typically indicate acute inflammation from infection, injury, or inflammatory disease rather than cardiovascular risk. Persistently elevated levels may suggest chronic inflammatory conditions, metabolic syndrome, or ongoing tissue damage that warrants further medical evaluation.
Privacy & confidentiality
Your hs-CRP test results are completely confidential and protected by HIPAA regulations. Results are not shared with your personal doctor unless you choose to do so, will not be added to your medical records, and will not appear on insurance explanations of benefits since no insurance billing is involved.
Frequently asked questions
Related tests
Lipid Panel
Combined with hs-CRP provides comprehensive cardiovascular risk assessment beyond cholesterol alone
View TestC-Reactive Protein (CRP)
Standard CRP test for detecting acute inflammation and infections
View TestHeart Health Panel
Comprehensive cardiovascular screening that may include inflammatory markers
View TestDiabetes Panel
Evaluates metabolic conditions often associated with chronic inflammation
View TestRelated conditions
Last reviewed: April 2026
CPT Code: 86141
This test may not be available in: NY, NJ, RI
This page is for informational purposes only and does not constitute medical advice. Always consult with a healthcare provider regarding any health concerns. LevelPanel does not diagnose, treat, or prescribe.
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LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.
Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
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