The C-Reactive Protein (CRP) test measures the level of CRP, a protein produced by the liver in response to inflammation, in the blood. It is a general test used to detect inflammation in the body, but it does not specify the location or cause of the inflammation. There is also a high-sensitivity CRP (hs-CRP) test, which is more sensitive and is used to assess the risk of heart disease.
Indications of the Test
The test is used to:
- Check for infection
- Help diagnose chronic inflammatory diseases such as rheumatoid arthritis or lupus
- Assess the risk of heart disease
- Monitor people after surgery or other invasive procedures to check for complications
No special preparation is usually necessary for this test. However, it is important to inform the healthcare provider about any medications or supplements being taken, as they might affect the test results.
Typical Reference Values
The normal CRP level is generally less than 0.9 milligrams per deciliter (mg/dL). However, normal CRP values can vary from lab to lab. A high test result, usually equal to or greater than 8 mg/L or 10 mg/L, is a sign of inflammation. The specific reference range may be provided by the lab conducting the test.
The turnaround time for the CRP test is typically short, and results are often available within a day or two.
Order This Test
You can order this test by clicking the “Order Test” button and adding it to the cart. If you are being treated for a long-term inflammatory condition or an infection, this test may be used to see if the treatment is working