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

ANA Positive/Reactive: What Does It Mean?

A positive ANA can occur with autoimmune disease but may also be found in healthy people; it is not a diagnosis on its own.

Test summary

Test name: ANA
Abbreviations: ANA, FANA
Category: Autoimmunity / Rheumatology
Panel: Autoimmune Serology
Specimen: Serum / plasma
Common units: qualitative, titer, pattern

What does the test measure?

ANA checks for antinuclear antibodies in blood.

Why is the test ordered?

ANA is used to support evaluation when lupus or other systemic autoimmune disease is suspected.

Information about a low result

A negative ANA can lower the likelihood of some autoimmune diseases but does not rule out all of them by itself.

Information about a high result

A positive ANA can occur with autoimmune disease but may also be found in healthy people; it is not a diagnosis on its own.

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: General ANA screening context
Specimen: Serum / plasma
Method: ANA immunoassay / IFA context

Sourced reference/decision context for ANA

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

ANA is interpreted with titer, pattern, symptoms and, when needed, more specific autoantibody 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
Autoantibody Testing — U.S. National Library of Medicine (MedlinePlus)
Government medical reference · 2025 · Autoantibody tests including ANA, RF and other systemic antibodies · 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