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C-reactive protein (CRP) by nephelometry

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

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

Quick summary

["CRP helps doctors track inflammation in your body."]

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

Key facts at a glance

LOINC
11010-6
Short code
EBV VCA IgM Titr CSF IF
Synonyms
EBV VCA IgM Titr CSF IF
Category
chemistry
Sample
csf
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
CPT
82784
Specimen volume
1-2 mL
Stability
Immediate analysis required, Refrigerated: 1h
Hemolysis max
200
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order a CRP test to check for signs of inflammation, monitor conditions like arthritis or heart disease, or evaluate responses to treatments. It can also help diagnose infections or assess risks for certain health issues.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood, which is then sent to the lab for testing.

What the Results Mean

Results are not given as a specific range since reference values vary by lab. Higher than normal levels may indicate inflammation, infection, or other health concerns. Your provider will interpret results in relation to your medical history and symptoms.

Common Conditions Monitored

CRP is often used to monitor conditions like rheumatoid arthritis, lupus, or heart disease. It can also help track how well treatments are working or if new issues arise.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

CRP is a useful marker for inflammation but is not definitive for diagnosing specific conditions. It’s typically used alongside other tests and clinical findings for a full assessment.

Short name

CRP (Nephelometry)

Frequently asked questions

What causes CRP levels to change?
CRP levels can rise due to infections (like colds or flu), injuries, surgeries, or certain medical conditions. Stress, smoking, or certain medications may also affect CRP levels, though not always noticeably.
How often should I get this test?
Your provider will determine how often you need this test based on your health needs. Some people get it every few months, while others may need it less frequently or only when symptoms appear.
Can diet or lifestyle affect CRP levels?
Yes, diet and lifestyle can influence CRP levels. Eating a healthy, anti-inflammatory diet, staying physically active, and avoiding smoking may help lower CRP levels over time.
  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