List of Quest Diagnostics Stores in Northridge, CA Outlet Note Regular Brands Quest Diagnostics California Northridge Rating 4.7 based on 66 votes Products STD Testing Clinical Laboratory Services Drug Test Blood Test NameAddressPhone Name/Address/Phone Quest Diagnostics outlet - Northridge 18350 Roscoe Blvd, Ste 712 (818) 701-0410 Quest Diagnostics outlet - Northridge 18433 Roscoe Blvd, Ste 105 (818) 701-0858 Quest Diagnostics outlet - Northridge 18250 Roscoe Blvd, Ste 120 (818) 772-9386 People Also Viewed