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Know All The Quest Diagnostics Working Hours of Operation!

When it comes to Quest Diagnostics hours, it’s important to be aware of the times that the lab is open. This can help you avoid any unnecessary delays in getting your results. With that in mind, we’ve compiled a list of the Quest Diagnostics hours for each location. Keep in mind that these may vary, so be sure to check with your local lab before making a trip.

About Quest Diagnostics

In 1967, they found Quest Diagnostics Incorporated as a clinical laboratory company in the United States. As a Metropolitan Pathology Laboratory, it eventually became an independent corporation. It listed the company on the Fortune 500 list of U.S. companies. The company has branches in the United States, Mexico, the United Kingdom, Brazil, and collaborates with a number of hospitals and clinics around the world. The company offers diagnostic services for a variety of chronic conditions, including cardiovascular disease, neurological disorders, cancer, and infectious diseases. Quest Diagnostics offers free coupons for participating in their Quest Diagnostics Customer Survey.

Quest Diagnostics Hours on Weekdays

From Monday through Friday, View Quest Diagnostics’ opening and closing sessions are held during regular business hours. A typical timetable, however, may not apply. The Specific Store Hours, when necessary, may deviate from the regular timing listed below.

Quest Diagnostics Regular HoursQuest Diagnostics Open HoursQuest Diagnostics Close Hours
Monday7:30 am4:00 pm
Tuesday7:30 am4:00 pm
Wednesday7:30 am4:00 pm
Thursday7:30 am4:00 pm
Friday7:30 am4:00 pm

Quest Diagnostics Weekend Hours

Unlike during the week, Quest Diagnostics normally shuts on weekends. If you are heading to Quest Diagnostics on Saturdays and Sundays, you should plan ahead and finish your chores throughout the week. Quest Diagnostics is open on Saturdays from afternoon to two p.m. in select areas.

Quest Diagnostics Saturday HoursClosedClosed
Quest Diagnostics Sunday HoursClosedClosed
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Quest Diagnostics Holiday Hours

Quest Diagnostics has several holidays it chooses to observe, which means it will close on certain days. Find out what time Quest Diagnostics close on holidays and how late it stays open. Typically, most places change their working days from regular days. In fact, to accommodate customer needs, Quest Diagnostics locations open later or close earlier than usual. No specifics like if Quest Diagnostics are open or closed on holidays like Christmas, Thanksgiving, and Easter are available at this time.

Valentine’s DayOpen
Presidents DayOpen
Good FridayOpen
Labor DayOpen
New Year DayOpen
Memorial DayOpen
Father’s DayOpen
Easter SundayClosed
Martin Luther King, Jr. DayOpen
Halloween DayOpen
Independence DayOpen
Easter MondayOpen
Thanksgiving DayClosed
Veterans DayOpen
New Year’s EveOpen
Christmas DayClosed
Columbus DayOpen

Quest Diagnostics Hours FAQs

What are the Thanksgiving hours of Quest Diagnostics?

Thanksgiving Day is a federally recognised holiday in the United States. However, according to the official Quest holiday hours, retailers’ operating hours on Thanksgiving Eve will differ from regular days.

Is Quest Diagnostics Open on Christmas day?

No, Quest Diagnostics is not open on Christmas.

What time does Quest Diagnostics close?

Quest Diagnostics closes at 4 p.m. on weekdays and is completely closed on weekends.


Quest Diagnostics hours are designed to be convenient for patients. The customer service representatives are available during business hours to answer any questions that you may have. You can also visit the Quest Diagnostics Website to find a location near you and schedule an appointment online.

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