In the time frame of 1 422 days after December 27, 2020, records show questdiagnostics.com passed 18 uptime tests. Of every analysis performed, questdiagnostics.com was functional 18 times, latest on November 18, 2024, returning a 200 status code. Testing shows that there have never been any inoperability issues with questdiagnostics.com as of November 19, 2024. The replies that were received indicated that as of November 19, 2024, no error statuses were noted. On November 18, 2024, questdiagnostics.com had a response time of 1.740 seconds, with an average of 1.587 seconds.