Anti-CCP (Cyclic Citrullinated Peptide)
The Anti-CCP test detects antibodies against citrullinated proteins that are highly specific for rheumatoid arthritis, often appearing before symptoms develop.
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What this test measures
The Anti-CCP test measures anti-cyclic citrullinated peptide antibodies, which are autoantibodies that target citrullinated proteins found in the joints of individuals with rheumatoid arthritis. These antibodies form when the immune system mistakenly identifies the body's own modified proteins as foreign invaders and produces antibodies against them.
Anti-CCP antibodies are highly specific markers for rheumatoid arthritis, with approximately 96% specificity, making them superior to other arthritis markers for accurate diagnosis. Unlike rheumatoid factor testing, anti-CCP antibodies are rarely found in healthy individuals or those with other autoimmune conditions. These antibodies are present in approximately 60-70% of patients with rheumatoid arthritis and can be detected even before symptoms develop.
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Individuals experiencing symptoms suggestive of rheumatoid arthritis should consider this test, including persistent joint pain, morning stiffness lasting more than one hour, swelling in multiple joints, and fatigue.
- Those seeking early detection of rheumatoid arthritis may benefit from testing, as anti-CCP antibodies can be present before significant joint damage occurs and even when joint inflammation is not yet apparent.
- People who have had inconclusive rheumatoid factor results may find anti-CCP testing valuable, as it provides more accurate diagnosis than RF testing alone and can help distinguish rheumatoid arthritis from other inflammatory conditions.
- Patients diagnosed with early arthritis who want to understand their prognosis should consider this test, as positive anti-CCP results may indicate increased risk for severe, erosive joint disease.
- Individuals with a family history of rheumatoid arthritis or those in early stages of joint inflammation may benefit from testing to assess their likelihood of developing RA and guide preventive care decisions.
What to expect
Preparation
No special preparation is needed for the Anti-CCP test. Fasting is not required, and individuals can take their regular medications unless specifically instructed otherwise by their healthcare provider.
Sample Type
The test requires a simple blood draw from a vein in the arm, similar to any routine blood test. The procedure typically takes just a few minutes and involves minimal discomfort.
Collection
A healthcare professional will clean the injection site, insert a small needle to draw the blood sample, and apply a bandage. Normal activities can be resumed immediately after the blood draw.
Turnaround
Results are typically available within 1-3 business days after the laboratory receives the sample. No doctor visit is required to order this test or receive results.
Understanding your results
Anti-CCP test results are reported as positive or negative, along with antibody concentration measured in units per milliliter (U/mL) or enzyme units per milliliter (EU/mL). A positive result does not automatically confirm rheumatoid arthritis diagnosis, as clinical symptoms and additional tests must be considered together for accurate assessment.
| Population | Reference Range | Notes |
|---|---|---|
| Adults | Less than 20 U/mL or EU/mL | Values below 20 units per milliliter are typically considered normal and within reference range |
Reference ranges may vary by laboratory and individual factors. Results should be interpreted by a healthcare provider in the context of your overall health.
What does a “Low” result mean?
Low levels of anti-CCP antibodies may be detected in some individuals but may not be sufficient to produce a positive result. A negative result does not rule out rheumatoid arthritis, as these antibodies are present in only about 60-70% of RA patients, meaning some individuals with the condition may test negative. In asymptomatic individuals, a negative result may suggest a lower risk of developing rheumatoid arthritis in the near future.
What does a “High” result mean?
Elevated anti-CCP antibody levels above 20 U/mL typically indicate the presence of these specific antibodies and may suggest an increased likelihood of rheumatoid arthritis. Higher antibody concentrations are often associated with more aggressive disease progression and may indicate a greater risk of joint damage. Significantly elevated levels may be useful in identifying patients who are more likely to develop erosive joint disease.
Privacy & confidentiality
All test results are kept strictly confidential and are protected under HIPAA regulations. Results are not shared with insurance companies, do not appear on insurance explanation of benefits, and are not automatically added to your medical record.
Frequently asked questions
Related tests
Rheumatoid Factor (RF)
$39Often tested together with anti-CCP for comprehensive rheumatoid arthritis evaluation
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$49Helps differentiate rheumatoid arthritis from other autoimmune conditions
View TestC-Reactive Protein (CRP)
$49Measures inflammation levels that commonly accompany rheumatoid arthritis
View TestErythrocyte Sedimentation Rate (ESR)
$29Another marker of inflammation useful in rheumatoid arthritis assessment
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CPT Code: 86200
This test may not be available in: NY, NJ, RI
This page is for informational purposes only and does not constitute medical advice. Always consult with a healthcare provider regarding any health concerns. LevelPanel does not diagnose, treat, or prescribe.
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