Confidential results No doctor visit required Results in 1-3 days 4,500+ locations
Quest Diagnostics

Lab Testing at Quest Diagnostics - Mercy Southfork

Quest Diagnostics Patient Service Center in Saint Louis, MO 63128.

Order Lab Tests for Collection at This Location

Browse All Tests

Popular tests at this location:

Address

12700 Southfork Rd Ste 150
Saint Louis, MO 63128
St. Louis County

Hours

Monday6:00 AM – 5:00 PM
Tuesday6:00 AM – 5:00 PM
Wednesday6:00 AM – 5:00 PM
Thursday6:00 AM – 5:00 PM
Friday6:00 AM – 5:00 PM
Saturday7:00 AM – 12:00 PM
SundayClosed

Nearby alternatives

More lab options around Saint Louis

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.