Quest Diagnostics

Lab Testing at Quest Diagnostics - Mercy Patients First

Quest Diagnostics Patient Service Center in Washington, MO 63090.

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Popular tests at this location:

TSH Lipid Panel CBC A1C Testosterone Vitamin D CMP

Address

901 Patients First Dr
Washington, MO 63090
Franklin County

636-283-1509

Hours

Monday	6:30 AM – 5:00 PM
Tuesday	6:30 AM – 5:00 PM
Wednesday	6:30 AM – 5:00 PM
Thursday	6:30 AM – 5:00 PM
Friday	6:30 AM – 5:00 PM
Saturday	8:00 AM – 12:00 PM
Sunday	Closed

Nearby alternatives

Mercy Hospital Washington
901 E 5th St 1st Floor, Washington, MO 63090
0.3 mi
LabCorp Wentzville
801 Medical Dr Ste 100, Wentzville, MO 63385
20.1 mi
Quest Diagnostics - Wentzville - Employer Drug Testing Not Offered
1201 Wentzville Pkwy Ste 117, Wentzville, MO 63385
20.6 mi
Quest Diagnostics - Eureka
98 The Legends Pkwy Ste 108, Eureka, MO 63025
20.6 mi
Quest Diagnostics - O'fallon
3449 Pheasant Meadow Dr Ste 101, O Fallon, MO 63368
21.4 mi

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.