Quest Diagnostics

Lab Testing at Quest Diagnostics - St Peters

Quest Diagnostics Patient Service Center in Saint Peters, MO 63376.

Order Lab Tests for Collection at This Location

Browse All Tests

Popular tests at this location:

TSH Lipid Panel CBC A1C Testosterone Vitamin D CMP

Address

4101 Mexico Rd Ste E
Saint Peters, MO 63376
St. Charles County

636-441-2938

Hours

Monday	6:00 AM – 5:00 PM
Tuesday	6:00 AM – 5:00 PM
Wednesday	6:00 AM – 5:00 PM
Thursday	6:00 AM – 5:00 PM
Friday	6:00 AM – 5:00 PM
Saturday	7:00 AM – 1:00 PM
Sunday	Closed

Nearby alternatives

LabCorp Saint Peters
205 First Executive Ave, Saint Peters, MO 63376
0.7 mi
LabCorp Saint Charles
1475 Kisker Rd Ste 140, Saint Charles, MO 63304
4.3 mi
LabCorp Saint Charles
711 Veterans Memorial Pkwy 103, Saint Charles, MO 63303
4.3 mi
Quest Diagnostics - O'fallon
3449 Pheasant Meadow Dr Ste 101, O Fallon, MO 63368
7.4 mi
LabCorp Maryland Heights
12685 Dorsett Rd Ste A, Maryland Heights, MO 63043
8.1 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.