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Quest Diagnostics

Lab Testing at Quest Diagnostics - Sayville

Quest Diagnostics Patient Service Center in Sayville, NY 11782.

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Address

160 Middle Rd
Sayville, NY 11782
Suffolk County
516-677-7734

Hours

Monday7:00 AM – 3:00 PM
Tuesday7:00 AM – 3:00 PM
Wednesday7:00 AM – 3:00 PM
Thursday7:00 AM – 3:00 PM
Friday7:00 AM – 3:00 PM
Saturday7:00 AM – 12:00 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.