Can this result diagnose a condition on its own?

No. The result should be interpreted with symptoms, medical history, assay method and related tests.

Which reference range should I use?

Use the performing laboratory's own reference or decision range and reporting method first.

When should I discuss the result with a healthcare professional?

Reactive/positive, clearly abnormal, persistent or symptom-associated results should be reviewed by a healthcare professional.

Information about a laboratory test

Anti-CCP Positive/Reactive: What Does It Mean?

A positive anti-CCP can support the likelihood of rheumatoid arthritis in the right clinical context but is not diagnostic by itself.

Test summary

Test name: Anti-CCP
Abbreviations: Anti-CCP, CCP antibody, ACPA
Category: Autoimmunity / Rheumatology
Panel: Rheumatoid Arthritis Evaluation
Specimen: Serum / plasma
Common units: U/mL, qualitative

What does the test measure?

Anti-CCP checks for antibodies to cyclic citrullinated peptides in blood.

Why is the test ordered?

Anti-CCP helps evaluate suspected rheumatoid arthritis together with RF and clinical findings.

Information about a low result

A negative anti-CCP does not completely rule out rheumatoid arthritis.

Information about a high result

A positive anti-CCP can support the likelihood of rheumatoid arthritis in the right clinical context but is not diagnostic by itself.

Reference and clinical context

Start with the performing laboratory's reference or decision range, assay method, specimen and reporting unit. A single result usually does not establish a diagnosis on its own.

Reference range 1

Population: Rheumatoid arthritis evaluation context
Specimen: Serum / plasma
Method: Anti-CCP antibody assay

Sourced reference/decision context for Anti-CCP

This is sourced reference or clinical-context information; the user's own laboratory report, assay method and clinical context take priority.

Reference ranges may vary by laboratory, method used, age, sex, pregnancy status, and clinical context. The reference range on your own laboratory report takes precedence.

Interpretation notes

Anti-CCP is interpreted with RF, symptoms, examination and other tests.

Related specialties

Rheumatology
Internal Medicine

Frequently asked questions

Sources

ANA (Antinuclear Antibody) Test — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2025 · ANA purpose, positive/negative interpretation and limitations · Verified: Aug 12, 2026
Rheumatoid Factor (RF) Test — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2025 · RF use, high-result limitations and RA context · Verified: Aug 12, 2026
CCP Antibody Test — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2024 · Anti-CCP use and rheumatoid arthritis evaluation · Verified: Aug 12, 2026