Your doctor will discuss what your CRP test result means.

For a standard CRP test, a normal reading is less than 10 milligram per liter (mg/L). A test result showing a CRP level greater than 10 mg/L is a sign of serious infection, trauma or chronic disease, which likely will require further testing to determine the cause.

If you're having an hs-CRP test to evaluate your risk of heart disease, current risk levels used include:

  • Lower risk. You have an hs-CRP level of less than 2.0 milligram per liter (mg/L).
  • Higher risk. You have an hs-CRP level greater than 2.0 mg/L.

These risk levels aren't a definitive measure of your risk because the ideal indicator of high CRP isn't clearly defined. Also, because a person's CRP levels vary over time, it's recommended that the average of two tests, ideally taken two weeks apart, be used to determine coronary artery disease risk.

If you're having an hs-CRP test to check for heart disease, your doctor is likely to request a cholesterol test at the same time. Other tests might be done to further evaluate your risk. Your doctor might also recommend lifestyle changes or medications to decrease your risk of a heart attack.