Quest Diagnostics
Lab Testing at Mercy Occ Health - Jefferson
Occupational/employer health partner in Festus, MO 63028.
Occupational Health Site
This is primarily an occupational or employer health location. Access for consumer DTC lab orders may be restricted to workers' compensation or employer-sponsored testing. Please call 636-933-1669 before visiting to confirm they accept your order.
Order Lab Tests Online
Browse All TestsNote: tests available at this location depend on its services. Confirm by calling before visiting.
Address
1390 Us Highway 61 Ste 3200Festus, MO 63028
Jefferson County
Hours
| Monday | 10:00 AM – 5:00 PM |
| Tuesday | 10:00 AM – 5:00 PM |
| Wednesday | 10:00 AM – 5:00 PM |
| Thursday | 10:00 AM – 5:00 PM |
| Friday | 10:00 AM – 5:00 PM |
| Saturday | Closed |
| Sunday | Closed |
Nearby alternatives
- Quest Diagnostics - Festus1463 Us Highway 61, Festus, MO 630280.2 mi
- LabCorp Arnold3613 Richardson Square Dr Ste 300, Arnold, MO 6301014.8 mi
- Quest Diagnostics - Arnold12 Arnold Mall, Arnold, MO 6301017.1 mi
- LabCorp Waterloo509 Hamacher St, Waterloo, IL 6229817.2 mi
- Quest Diagnostics - Columbia Il1000 Eleven S Ste 2h, Columbia, IL 6223620.3 mi
About this location
Occupational/employer health partner. 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.