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Quest Diagnostics

Lab Testing at Quest Diagnostics - Sterling

Quest Diagnostics Patient Service Center in Sterling, VA 20165.

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Address

14 Pidgeon Hill Dr Ste 130
Sterling, VA 20165
Loudoun County

Hours

Monday7:30 AM – 3:30 PM
Tuesday7:30 AM – 3:30 PM
Wednesday7:30 AM – 3:30 PM
Thursday7:30 AM – 3:30 PM
Friday7:30 AM – 3:30 PM
SaturdayClosed
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.