List of Quest Diagnostics Stores in El Cajon, CA Outlet Note Regular Brands Quest Diagnostics California El Cajon Rating 4.7 based on 66 votes Products STD Testing Clinical Laboratory Services Drug Test Blood Test NameAddressPhone Name/Address/Phone Quest Diagnostics outlet - El Cajon 860 Jamacha Rd, Ste 103 (619) 579-0411 People Also Viewed