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Serum Area Under the Curve for C-Reactive Protein (CRP) over Radial Immunodiffusion (CRP AUC Radial)

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

This test measures the cumulative level of C-reactive protein (CRP) in your blood over time using a radial immunodiffusion method. CRP is a protein produced by your liver in response to inflammation.

Quick summary

["This test helps track long-term inflammation levels in your blood."]

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

Key facts at a glance

LOINC
98616-6
Short code
SNAP area AUC R radial n
Synonyms
SNAP area AUC R radial n
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
nerve-conduction
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why is this test done?

Your healthcare provider may order this test if they suspect chronic inflammation, to monitor conditions like autoimmune diseases, infections, or other inflammatory disorders. It can also be used to assess response to treatment over time.

What does the result mean?

The result provides an overall measure of CRP exposure, which can indicate persistent inflammation. While individual interpretations depend on clinical context, elevated levels may suggest ongoing inflammatory processes.

How is the sample collected?

A blood sample is drawn from a vein, usually in your arm. The blood is then processed to separate serum, which is sent to the lab for analysis using radial immunodiffusion.

What should you do before the test?

Avoid taking anti-inflammatory medications (like ibuprofen or aspirin) for 48 hours before the test, as they may affect CRP levels. Also, inform your provider about any medications or conditions that could impact results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CRP AUC (Serum)

Frequently asked questions

What does a high CRP AUC result mean?
A high CRP AUC result suggests prolonged inflammation in your body, which could be due to chronic conditions like arthritis, heart disease, or infections. Your provider will consider this alongside other factors to guide diagnosis and treatment.
How often should I get this test?
The frequency depends on your medical condition and treatment plan. Your healthcare provider will determine how often to monitor CRP levels based on your specific needs and symptoms.
Can diet or exercise affect this test result?
Yes, lifestyle factors like diet, exercise, and stress can influence inflammation. Maintaining a balanced diet, managing stress, and staying physically active may help support overall health and potentially 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