If done recently at Quest ($119.) this was a blood draw test (not a finger stick test)...the recently FDA approved Roche blood draw antibody test is close to 100% accurate. (Am not sure what brand test Quest is currently using).
https://www.zdnet.com/article/i-got-quests-new-covid-19-antibody-test-and-it-was-strange/
https://education.questdiagnostics.com/faq/FAQ219
https://www.roche.com/media/releases/med-cor-2020-05-03.htm
quest indicates that they’re not using an FDA-validated test:
https://education.questdiagnostics.com/faq/FAQ219