COVID-19 Antibody Test
Detect antibodies to SARS-CoV-2 to determine if you've previously been infected with COVID-19, with no doctor visit required.
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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 blood test detects antibodies the immune system produces after exposure to SARS-CoV-2, the virus responsible for COVID-19. When the body encounters the virus, it generates antibodies targeting specific viral components, including IgM (early-response antibodies), IgG (longer-lasting antibodies), and IgA. Most individuals develop detectable IgG antibodies within one to three weeks of infection.
The test specifically targets antibodies against the spike protein of SARS-CoV-2, the structure the virus uses to enter human cells. It is important to note that both natural infection and COVID-19 vaccination can produce spike protein antibodies, so a positive result may reflect either prior infection or immunization. The test is designed to determine whether an immune response has occurred; however, current evidence does not establish a specific antibody level that guarantees protection against future infection. Antibody levels can vary widely between individuals and tend to change over time after both infection and vaccination.
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Individuals who suspect they may have had COVID-19 in the past but were never tested or received inconclusive results
- Those who experienced symptoms consistent with COVID-19 weeks or months ago and want to confirm a previous infection
- People who were exposed to someone with COVID-19 and want to determine if they contracted the virus
- Healthcare workers or essential workers who want to know their infection history for occupational health purposes
- Individuals participating in research studies or workplace screening programs that require antibody testing
- Those with persistent symptoms that may be related to a previous COVID-19 infection (sometimes called "long COVID")
What to expect
Preparation
No special preparation is required for this test. Individuals do not need to fast or stop taking any medications. The test can be taken at any time of day.
Sample Type
A blood sample is collected through a standard blood draw from a vein in the arm, similar to other routine blood tests.
Collection
At the lab, a trained phlebotomist will clean the injection site, insert a small needle into a vein, and collect the blood sample in a specialized tube. The process typically takes just a few minutes.
Turnaround
Results are typically available within 1-3 business days after the sample reaches the laboratory.
Understanding your results
Results indicate whether SARS-CoV-2 antibodies were detected (positive) or not detected (negative) in the blood sample. A negative result may mean no prior exposure or vaccination, or it may reflect testing performed too soon after exposure, since antibodies typically require one to three weeks to reach detectable levels. A positive result confirms that the immune system has responded to the virus or vaccine but does not establish a defined level of protection against future infection. Healthcare providers interpret results alongside vaccination history, timing of potential exposure, and symptoms to provide appropriate context.
| Population | Reference Range | Notes |
|---|---|---|
| Adults | Results are typically reported as positive/reactive or negative/non-reactive | Semi-quantitative tests may also provide numerical values, but specific ranges vary by laboratory and test methodology |
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?
A negative (non-reactive) result means that antibodies to SARS-CoV-2 were not detected in the blood sample. A negative result suggests that you haven't had a recent COVID-19 infection, however, it doesn't prove that there has been no prior or current infection. Several factors can lead to a negative result: if you have recently been infected with COVID-19, antibodies may not yet be present; some people infected with COVID-19 do not develop enough antibodies to be detected; or if infection occurred a long time ago, there may not be enough antibodies to detect. Antibodies could be present at levels below the test's threshold for detection. A negative result does not rule out the possibility of past or current infection with SARS-CoV-2.
What does a “High” result mean?
A positive (reactive) result indicates that antibodies to SARS-CoV-2 were detected in the blood. A positive antibody test result could mean you previously had a SARS-CoV-2 infection or COVID-19, or could also mean the test is detecting antibodies in response to your COVID-19 vaccine. The test may have found antibodies from a previous COVID-19 infection, from a related coronavirus infection, or from having received a COVID-19 vaccine. However, it's important to note that a positive SARS-CoV-2 antibody test does not necessarily mean you are immune or have immunity that will prevent COVID-19, and a positive result does not mean that you are immune to COVID-19. The test cannot determine current infection status and should not be used for diagnosing active COVID-19.
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 COVID-19 antibody test results are completely confidential and private. Unlike tests ordered by your doctor, these results are <u>not reported to your doctor</u> or healthcare provider unless you choose to share them. The results are <u>not part of your medical records</u> and will <u>not appear on insurance statements</u> or explanation of benefits (EOB) forms. Your employer, insurance company, or government agencies will not have access to your test results. This privacy protection allows individuals to get important health information about their COVID-19 exposure history without concerns about how the results might be used by others. You have complete control over who sees your results and how you use this information for your health decisions.
Frequently asked questions
Related tests
Last reviewed: April 2026
CPT Code: 86769
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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