LabCorp Test

C-Reactive Protein (CRP) Blood Test, High Sensitivity, Cardiac Risk Assessment

Quick Overview

Assesses the risk of cardiovascular and peripheral vascular disease.

Test #120766


Availability: In stock

Also Known As Cardiac C-Reactive Protein (CRP), Cardiac CRP, CRP, Cardiac, CRP, High Sensitivity, High-sensitivity CRP; hs-CRP; Cardio CRP
Preparation No special preparation required.
Test Results 1-2 days. May take longer based on weather, holiday or lab delays.

There are no fasting requirements associated with the CRP blood test.  Unless specifically instructed otherwise, the patient may eat and drink, as well as take most medications and supplements, before coming to the lab for testing.  Some medications, including the painkillers ibuprofen and acetaminophen, can affect test results.  Individuals should be sure to tell their doctors about what medications they are taking and ask if the medications can be taken the day of the test.  One other consideration when preparing for this blood test is to know that the test is often ordered in combination with other blood tests that do require fasting.  Patients should make sure that they are aware of all of the blood tests that will be performed.  If another blood test does require fasting, the patient may fast for this test without negatively affecting the CRP blood test results.

Why It Is Used

The CRP blood test, also known as the C-reactive protein blood test, is used to evaluate the level of inflammation in the body.  The test is commonly ordered to monitor conditions such as arthritis, pelvic inflammatory disease, inflammatory bowel disease, and coronary artery disease.  The test is also used to measure the presence of infection after surgery and the level of damage sustained from a heart attack. 

How It Works

CRP (C-reactive protein) is a protein that is released into the blood stream when there is inflammation or injury in the body.  The C-reactive protein blood test is often used to assess risk of coronary artery disease and heart disease.  In coronary artery disease the coronary arteries start to swell and narrow.  As this occurs more CRP is released into the blood, so high levels of CRP in the blood could indicate inflammation in the coronary arteries.  This inflammation increases one’s risk of the artery becoming completely blocked and causing a heart attack.  However, a high level of CRP in the blood does not specifically indicate that the inflammation is in the arteries – it could be anywhere in the body.  For this reason, the C-reactive protein blood test is usually only ordered to assess heart attack risk when someone has already presented with other risk factors.


The C-reactive protein blood test can be used to aid in the diagnosis and treatment of a number of conditions, and results may be interpreted differently based on the how the test is being used.  In general, though, a higher than normal level of CRP in the blood indicates that there is inflammation in the body.

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