COVID-19 Antibody (IgG)

The SARS-CoV-2 IgG assay is a qualitative test designed to detect IgG antibodies to the nucleocapsid protein of SARS-CoV-2 in serum and plasma from patients who are suspected of past coronavirus disease (COVID-19) or in serum and plasma of subjects that may have been infected by SARS-CoV-2.

Reactive (Positive) results may be due to past or present infection with SARS-CoV-2. Results from antibody testing should not be used as the sole basis to diagnose or exclude SARS-CoV-2 infection or to inform infection status.

Nonreactive (Negative) results do not rule out SARS-CoV-2 infection, particularly in those who have been in contact with the virus. Follow-up testing with a molecular diagnostic should be considered to rule out infection in these individuals. Results from antibody testing should not be used as the sole basis to diagnose or exclude SARS-CoV-2 infection or to inform infection status.

This test run under an emergency use authorization from the FDA.

Ordering: We are pleased to perform serology testing for all patients who have a valid provider order. We recommend outside providers arrange to have their patients' blood drawn at their usual clinical draw sites and sent to the lab, preferably after contacting Client Support Services at commserv@uw.edu to facilitate testing.

For patients who do not regularly seek care within UW Medicine, our phlebotomists at the University of Washington Medical Center-Northwest Campus (UWMC-NW) and UWMC-NW Outpatient Medical Center (OPMC) located on Meridian Ave. N. are able to perform blood draws for testing with a valid provider order.

For all questions, contact Client Support Services (available 24/7):

Phone: (206) 520-4600 or (800) 713-5198
Fax: (206) 520-4903
Email: commserv@uw.edu

The test order requisition is available online.

UW Medicine Locations

Place order in ORCA, using "COVID-19 Antibody (IgG)".

For UWMC-Northwest ED/inpatients, place a Lab Undefined order in Soarian or PulseCheck for "NCVIGG: COVID-19 IgG."

Other Locations (eg, reference laboratory client)

Send all samples with the requisition available here (form is a fillable pdf - please download and enter information before printing)