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C-reactive protein (CRP) by turbidimetry (serum/plasma)

Published: August 9, 2026Updated: August 16, 2026

This test measures the level of C-reactive protein, a protein produced by the liver in response to inflammation in your body.

Quick summary

["CRP helps identify inflammation, often used to monitor conditions like infections, autoimmune diseases, or after surgery."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
16636-3
Short code
C immitis IgA CSF-aCnc
Synonyms
C immitis IgA CSF-aCnc
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order this test to check for signs of inflammation, monitor chronic conditions like rheumatoid arthritis or lupus, evaluate infection risk, or assess recovery after surgery or injury.

What to Expect Before the Test

No special preparation is needed. You may have a blood sample drawn from a vein in your arm, similar to other blood tests. Avoid strenuous activity or heavy meals 24 hours before if instructed.

What the Results Mean

Higher CRP levels may indicate inflammation, infections, or other health issues. Lower levels suggest minimal inflammation. Your results will be interpreted by your healthcare provider based on your overall health and medical history.

Common Conditions Monitored

CRP is often used to monitor conditions such as cardiovascular disease, autoimmune disorders, and infections. It can also help guide treatment decisions for conditions like arthritis or after procedures like heart bypass surgery.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CRP (Serum/Plasma)

Frequently asked questions

What does a high CRP level mean?
A high CRP level suggests your body is experiencing inflammation. This could be due to infections, autoimmune diseases, or other inflammatory conditions. Your doctor will discuss the next steps based on your symptoms and test results.
Can diet or exercise affect CRP levels?
Yes, lifestyle factors like diet, exercise, and stress can influence CRP levels. Eating a balanced diet, staying active, and managing stress may help lower inflammation over time.
Is CRP the same as a complete blood count (CBC)?
No, CRP is a specific protein test for inflammation, while a CBC checks for red and white blood cells, platelets, and other blood components. Both tests provide different but complementary information about your health.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy