Quest Diagnostics
Lab Testing at Proactive Work Chatsworth
Quest partner location in Chatsworth, CA 91311.
Partner Location
This location is part of Quest's partner network. Services and availability may differ from a standard Quest Patient Service Center. Please call 747-444-4090 before visiting to confirm they accept your lab order.
Order Lab Tests Online
Browse All TestsNote: tests available at this location depend on its services. Confirm by calling before visiting.
Address
9421 Winnetka AveChatsworth, CA 91311
Los Angeles County
Hours
| Monday | 8:00 AM – 6:00 PM |
| Tuesday | 8:00 AM – 6:00 PM |
| Wednesday | 8:00 AM – 6:00 PM |
| Thursday | 8:00 AM – 6:00 PM |
| Friday | 8:00 AM – 6:00 PM |
| Saturday | Closed |
| Sunday | Closed |
Nearby alternatives
- LabCorp Northridge18541 Roscoe Blvd, Northridge, CA 913242.5 mi
- Quest Diagnostics - Northridge Roscoe Boulevard18350 Roscoe Blvd Ste 603, Northridge, CA 913252.6 mi
- LabCorp West Hills7345 Medical Center Dr Suite 520, West Hills, CA 913074.2 mi
- Quest Diagnostics - West Hills Medical Center - Employer Drug Testing Not Offered7230 Medical Center Dr Ste 605, West Hills, CA 913074.3 mi
- LabCorp West Hills7301 Medical Center Dr Ste 304, West Hills, CA 913074.3 mi
About this location
Quest partner location. 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.