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C-reactive protein (CRP) with qualitative probe-based detection (e.g., immunochromatographic assay)

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

This test measures whether your body is producing a protein called C-reactive protein, which can signal inflammation.

Quick summary

["CRP helps doctors check for inflammation, often used to monitor conditions like infections or autoimmune diseases."]

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

Key facts at a glance

LOINC
88263-9
Short code
K oxytoca ompA Bld Pos Ql Probe
Synonyms
K oxytoca ompA Bld Pos Ql Probe
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

What Does This Test Measure?

CRP is a protein produced by your liver in response to inflammation or infection. While not a direct measure of inflammation, it’s a marker that helps identify when your body is reacting to injury, illness, or an overactive immune response.

Why Might You Need This Test?

Doctors may order this test to evaluate symptoms like fever, joint pain, or unexplained swelling, or to monitor chronic conditions like rheumatoid arthritis, heart disease, or certain infections.

Sample Collection and Preparation

A small blood sample is drawn from your arm. The test uses a qualitative probe method (often a rapid dipstick or stick test) to detect CRP without providing a numeric result.

What to Expect Before the Test

No special preparation is needed. Wear comfortable clothing and bring any medications you’re currently taking, as some may affect results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: CRP’s Role in Health

Short name

CRP Qualitative Test

Frequently asked questions

Is my CRP test result abnormal?
This test does not provide a specific numeric range, but a positive result (detectable CRP) suggests inflammation is present. A negative result means CRP was not detected, which may indicate no active inflammation. Results should always be interpreted by your healthcare provider in the context of your symptoms and medical history.
Can I get false results from this test?
False results are rare, but factors like recent infection, trauma, or certain medications (e.g., steroids) may affect CRP levels. Your doctor will discuss any potential influences on your test results.
How often should I get this test?
Frequency depends on your health condition. Some people get this test yearly to monitor chronic inflammation, while others may need it more often if symptoms or conditions change.
  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