Is Quest Diagnostics Down? Check Quest Diagnostics down trends and times.
questdiagnostics.com checking.. 
Website Status
Protocol
Response Time
Response Code
Ping
| Checks | Ping Status | Ping Time | HTTP Status | HTTP Time | Status |
|---|---|---|---|---|---|
| 9 days ago |  success |
24 ms | 200 (OK) | 319 ms | Up |
| 28 days ago | success |
24 ms | 200 (OK) | 359 ms | Up |