Quest Diagnostics

Lab Testing at Quest Diagnostics - Northridge Roscoe Boulevard

Quest Diagnostics Patient Service Center in Northridge, CA 91325.

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Popular tests at this location:

TSH Lipid Panel CBC A1C Testosterone Vitamin D CMP

Address

18350 Roscoe Blvd Ste 603
Northridge, CA 91325
Los Angeles County

747-232-4639

Hours

Monday	7:00 AM – 4:30 PM
Tuesday	7:00 AM – 4:30 PM
Wednesday	7:00 AM – 4:30 PM
Thursday	7:00 AM – 4:30 PM
Friday	7:00 AM – 4:30 PM
Saturday	8:00 AM – 12:00 PM
Sunday	Closed

Nearby alternatives

LabCorp Northridge
18541 Roscoe Blvd, Northridge, CA 91324
0.2 mi
Proactive Work Van Nuys
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2.6 mi
Proactive Work Chatsworth
9421 Winnetka Ave, Chatsworth, CA 91311
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Pacific Medical Services - 3rd Party Phlebotomy Service
5620 Wilbur Ave Ste 211, Tarzana, CA 91356
3.3 mi
Quest Diagnostics - Tarzana Etiwanda - Employer Drug Testing Not Offered
5525 Etiwanda Ave Ste 307, Tarzana, CA 91356
3.4 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.