Basic Autoimmune Panel (ANA, ESR, CRP, RF)
Measures four key biomarkers to evaluate inflammation and autoimmune activity in conditions like lupus, rheumatoid arthritis, and other inflammatory disorders.
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LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.
Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
What this test measures
This panel combines four widely used markers to screen for inflammation and autoimmune activity: antinuclear antibodies (ANA), erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), and rheumatoid factor (RF). Each marker captures a different facet of the immune and inflammatory response. ANA detects antibodies directed against the body's own cell nuclei, a hallmark of conditions like systemic lupus erythematosus and other connective tissue diseases. ESR gauges how quickly red blood cells settle, reflecting the overall level of systemic inflammation. CRP is an acute-phase protein produced by the liver that rises rapidly in response to tissue injury or infection.
Rheumatoid factor identifies antibodies associated with rheumatoid arthritis and certain other autoimmune conditions. Taken together, the four markers provide an initial assessment of whether autoimmune or inflammatory processes may be driving symptoms. However, none is specific to a single disease; positive results signal the need for further, more targeted testing to identify the particular condition involved.
What's included
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Individuals experiencing joint pain, stiffness, or swelling that persists for weeks or months
- Those with unexplained fatigue, fever, or muscle aches that may suggest inflammatory conditions
- People with family history of autoimmune diseases such as lupus, rheumatoid arthritis, or Sjögren's syndrome
- Patients with symptoms like skin rashes, mouth ulcers, or hair loss that could indicate systemic autoimmune activity
- Individuals with morning stiffness lasting more than 30 minutes or joint symptoms affecting multiple areas
- Those seeking to evaluate persistent inflammatory symptoms before seeing a specialist
What to expect
Preparation
No fasting is required for this test. Continue taking medications as prescribed unless instructed otherwise by your healthcare provider. It's best to inform the lab about any medications you're taking, as some drugs may affect inflammatory markers.
Sample Type
A simple blood draw from a vein in your arm, similar to routine blood work.
Collection
The blood draw typically takes just a few minutes. A healthcare professional will clean the area, insert a small needle, and collect the blood sample in tubes for testing.
Turnaround
Results are typically available within 2-3 business days and will be accessible through your secure online account.
Understanding your results
Each marker in the panel has its own reference range, and the results are most meaningful when evaluated as a group alongside clinical symptoms. Elevated inflammation markers (ESR and CRP) paired with a positive ANA or RF, for example, carry different diagnostic implications than elevated inflammation markers alone. It is important to note that these markers can also rise in response to infections, certain medications, and malignancies, not just autoimmune disease. Healthcare providers use the combined pattern of results, along with physical examination and medical history, to determine whether additional specialized testing is warranted.
| Population | Reference Range | Notes |
|---|---|---|
| Adults | ANA: Negative (<1:40 titer); ESR: Men <22 mm/hr, Women <29 mm/hr; CRP: <3.0 mg/L; RF: <15 IU/mL | Reference ranges may vary slightly between laboratories |
Reference ranges shown are general guidelines. Your lab report will include the specific reference range used by the laboratory that processed your sample, which is the authoritative range for interpreting your results.
What does a “Low” result mean?
Lower or normal values for these inflammatory markers typically indicate absence of significant inflammation or autoimmune activity at the time of testing. However, many autoimmune conditions can be present even when inflammatory markers are normal. Normal results do not completely rule out autoimmune conditions, especially in early stages of disease. Clinical symptoms and additional testing may still be warranted based on individual presentation.
What does a “High” result mean?
Elevated CRP levels above 1 mg/dL may indicate inflammatory conditions, while high ESR can be affected by many factors including age, infections, and inflammatory diseases. A positive ANA can be seen in 10% or more of the normal population and in individuals with family history of autoimmune conditions. The sensitivity of RF for rheumatoid arthritis ranges from 50% to 85%, with approximately 70% of RA patients showing positive RF. Elevated results may suggest autoimmune activity but require clinical correlation for proper interpretation.
Privacy & confidentiality
All test orders are authorized and results reviewed by an independent, board-certified physician who is not the patient's personal doctor. Your autoimmune panel results are completely confidential and handled with the highest level of privacy protection. Results are <u>not sent to your personal doctor</u> unless you specifically request them to be shared. The test results are <u>not part of your medical records</u> unless you choose to provide them to your healthcare provider. Additionally, testing conducted through our service does <u>not appear on insurance statements or EOBs</u>, ensuring your privacy is maintained. Many individuals choose direct-to-consumer testing to privately evaluate their autoimmune status without involving their primary care physician initially. This confidential approach allows people to understand their inflammatory markers and make informed decisions about their health without concerns about insurance implications or unwanted medical record entries.
Frequently asked questions
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Last reviewed: April 2026
CPT Code: 86235, 85652, 86140, 86431
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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LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.
Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
Not sure if this is the right test? Contact our care team for guidance.
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