In the time frame of 1 422 days after December 27, 2020, records show questdiagnostics.com passed 16 uptime tests. Of every analysis performed, questdiagnostics.com was functional 16 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 18, 2024. The replies that were received indicated that as of November 18, 2024, no error statuses were noted. On November 18, 2024, questdiagnostics.com had a response time of 1.430 seconds, with an average of 1.427 seconds.