Quick Reference
- Full form
- C-Reactive Protein
- Sample type
- Blood
- Fasting
- Not required
- Marker measured
- 1
- Report turnaround
- Same Day
- Available at
- All locations
About CRP (C-Reactive Protein)
CRP is a marker your liver produces in response to inflammation anywhere in the body, whether from an infection, injury, or a chronic condition. When CRP rises, it tells your doctor that something is triggering an inflammatory response, even before other symptoms are obvious.
It is a non-specific test, meaning a high CRP does not point to one particular cause, but it is extremely useful for tracking whether treatment for an infection or inflammatory condition is working over time.
No fasting is required, and results are available the same day, which matters when CRP is being used to monitor a patient closely, such as during a bacterial infection.
How to Prepare
- No fasting required.
- No special preparation needed before your blood draw.
Frequently Asked Questions
What does a high CRP level indicate?
A high CRP shows there is inflammation somewhere in the body, which could be from an infection, injury, or a chronic inflammatory condition, though it does not identify the exact cause on its own.
Do I need to fast before a CRP test?
No fasting is required for a standard CRP test.
Why do doctors order CRP alongside other tests?
CRP is often paired with tests like CBC to build a fuller picture of infection or inflammation severity, and to track how well treatment is working over time.
Can CRP levels indicate a bacterial versus viral infection?
Very high CRP levels are more commonly associated with bacterial infections, though your doctor will confirm this alongside your symptoms and other test results.
How soon will my CRP report be ready?
Same day, usually within a few hours of your blood draw.
Is home sample collection available for the CRP test?
Yes, in all City Care Lab service areas, which is useful when monitoring an ongoing infection without repeated trips to the lab.
This page provides general health information and is not a substitute for medical advice. Speak with your doctor about your specific results and treatment.