What Time Does Quest Diagnostics Open & Close?

Quest Diagnostics are open from morning till early evening on weekdays and weekends. It is also open on most federal holidays. Keep in mind that Quest Diagnostics hours may slightly vary across different areas. Nonetheless, most locations strictly conform to the operating hours we are about to discuss below.

What time Does Quest Diagnostics Open & Close on Weekdays?

Most Quest Diagnostics labs and offices open at 7 a.m. and close at 4:30 p.m., Monday through Friday. Please note that the operating hours of some labs and offices slightly vary by location. For example, there are some labs that open from 6 a.m. to 5 p.m. on weekdays. In addition, remember that the operating hours we have discussed above may be slightly adjusted on some federal holidays.

Is Quest Diagnostics Open on Saturday and Sunday?

Majority of Quest Diagnostics labs and offices are open on Saturday from 12 p.m. to 4:30 p.m. While they are usually closed on Sunday. Be aware that weekend operating hours also slightly vary across different centers. For instance, you may find some locations that open from 12 p.m. to 6 p.m. on Saturday. Also, remember that only a handful of locations are open on Saturday.

Quest Diagnostics Hours

DaysOpening and Closing Time
Monday7 AM – 4:30 PM
Tuesday7 AM – 4:30 PM
Wednesday7 AM – 4:30 PM
Thursday7 AM – 4:30 PM
Friday7 AM – 4:30 PM
Saturday12 PM – 4:30 PM

Quest Diagnostics Holiday Hours

Quest Diagnostics labs and offices are closed on Christmas Day, Thanksgiving and Easter Sunday. However, most centers will remain open on the rest of the holidays presented below. Bear in mind that there may be some slight modifications during some of these holidays.

New Year’s DayWednesdayJan 1Regular Hours
Martin Luther King DayMondayJan 18Regular Hours
Presidents’ DayMondayFeb 15Regular Hours
Good FridayFridayApril 2Regular Hours
EasterSundayApril 4Closed
Memorial DayMondayMay 31Regular Hours
Independence DaySundayJul 4Regular Hours
Labor DaySaturdayMay 1Regular Hours
Columbus DayMondayOct 11Regular Hours
Veterans DayThursdayNov 11Regular Hours
Day Before ThanksgivingWednesdayNov 24Regular Hours
ThanksgivingThursdayNov 25Closed
Black FridayFridayNov 26Regular Hours
Christmas EveFridayDec 24Regular Hours
Christmas DaySaturdayDec 25Closed
Day After ChristmasSundayDec 26Regular Hours