Antibody tests, also known as serology tests, detect antibodies in the blood. Antibodies indicate that you may have had a viral infection and that your body mounted an immune response to the virus that caused it.
IgG antibody testing is generally for people who feel well, who do not have current symptoms, who may have recovered from a COVID-19 infection and who want to know if they have had SARS-CoV-2 virus in the recent past.
FAQs | Test Results Guide | COVID-19 IgG Test Fact | Types of COVID-19 Tests
Testing is by appointment only and must be booked online. Walk-up testing is not available. No physician referral is required for the IgG antibody test.
Parents/guardians may book an appointment for children 10 years of age and older, however, patients under the age of 18 years must be accompanied by a parent/guardian. About Testing for Children Under 10
Unless you have a physician order, appointments for IgG antibody testing must be booked online through link below. Appointments for the IgG antibody test require advanced payment of $89, which will not be billed to insurance (see below for more information on billing and insurance).
Please Note: Our scheduling team cannot help you make an appointment by phone and will direct you back to our website for all information about appointment availability. Thank you for understanding and we appreciate your cooperation. We will be closed July 3, 4, 5 and 12.
Appointments for the IgG antibody test require advanced payment of $89, which will not be billed to insurance. National Jewish Health does not bill insurance for antibody testing appointments without a physician order. If you choose this option, your insurance will not be billed by National Jewish Health.
If you want your insurance to be billed for the test, please ask your physician for a referral. Your physician will need to submit an order on your behalf, and we will contact you schedule the testing appointment.
Please note that National Jewish Health does not determine insurance coverage. Contact your insurance provider to understand your antibody testing coverage and to confirm that National Jewish Health is an in-network hospital laboratory.
You may arrive anytime during your testing window.
Testing is administered at our drive-through testing tent between 13th and 14th Avenue on Harrison Street in the National Jewish Health parking lot. Please do not enter the main hospital for testing, unless you have a non-antibody testing appointment.
Enter the lot and follow the signs for IgG antibody testing. You will be checked in upon arrival and wait in your car for your turn. A National Jewish Health representative will let you know when it is your turn and will escort you from the car to the testing station.
This test starts with a blood draw. No fasting or dietary restrictions are required. To ensure the safety of our patients and staff, we may refuse to draw your blood if you have had new or worsening fever, cough or shortness of breath within the last two weeks. If you are currently sick, please talk to your doctor about options for testing and care, or contact our scheduling team at 303.398.1355.
Your results will be available to you in a secure, online account within 24 hours. Results will only be sent by mail only if specifically requested when you booked the appointment.
If you are 18 or older and do not already have a secure, patient portal account, you will automatically receive an email to activate your account with the subject of Activate Your Patient Account Now. Please check your SPAM folder before taking additional steps — this personalized email is the fastest way to access your account and results.
If you do not receive the email to create an online patient account within two hours of registering for the appointment, please click here to request a new account. Your new request will be completed within three business days.
You will receive an email notifying you when your test results are available. To view test results, log in to your secure, patient account and look for Test Results & More on your personalized dashboard. Click View Test Results and select View Details to download a PDF with your results.
A result status of PENDING indicates that your results are not available yet. Results are typically available within three to five business days.
Results can be accessed from your patient portal dashboard:
Access to additional patients must be under an authorized representative’s (parent, guardian, etc.) account.
FAQs | Test Results Guide | COVID-19 IgG Test Fact
Your COVID-19 IgG antibody test results will have one of four findings: Pending, Not Detected, Borderline or Detected.
Pending: The laboratory is still processing your blood sample.
Not Detected: IgG antibodies to SARS-CoV-2 were not detected in your blood. When antibodies are not detected the test result is considered negative. Negative results for IgG antibodies do not rule out a SARS-CoV-2 infection, particularly in people who have been in contact with the virus. Your immune function may have been suppressed by other health issues or the antibody level is too low for this test to detect.
Borderline: Borderline results show that the test detected some IgG antibodies to SARS-CoV-2, but the antibody level was too low to determine that you have had a past infection. Borderline results may indicate a very early infection or a prior infection with other Coronaviruses. It is recommended that the test be repeated at a later date.
Detected: IgG antibodies to SARS-CoV-2 were detected in your blood. These results indicate a recent or prior infection with SARS-CoV-2. Rarely, a false positive result can occur due to a prior infection with other human Coronaviruses.
Any follow-up questions should be referred to an individual’s physician. If you do not already have a physician, you can make an appointment with a doctor at National Jewish Health at 303.398.1355.
If you find you need to cancel your COVID-19 antibody test, please do so at least 48 hours before the appointment and complete the cancellation form.
We cannot change your scheduled time. If you wish to reschedule, please book a new available appointment time AND submit the cancellation form. You will pay for your new appointment and receive a refund for the cancelled one(s), subject to the cancellation policy above.
Learn more about COVID-19 and how it affects specific health conditions in these printable patient education materials.
Download COVID-19 Materials