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Quest Diagnostics

Lab Testing at Quest Diagnostics - Naperville

Quest Diagnostics Patient Service Center in Naperville, IL 60540.

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Address

640 S Washington St Ste 140
Naperville, IL 60540
DuPage County

Hours

Monday5:30 AM – 3:30 PM
Tuesday5:30 AM – 3:30 PM
Wednesday5:30 AM – 3:30 PM
Thursday5:30 AM – 3:30 PM
Friday5:30 AM – 3:30 PM
Saturday6:00 AM – 1:00 PM
SundayClosed

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About this location

Quest Diagnostics Patient Service Center. Quest Diagnostics operates one of the largest networks of clinical laboratories in the United States, offering a wide range of diagnostic tests for patients, physicians, and employers.

Listing last updated 2026-04-25.