List of Quest Diagnostics Stores in Elgin, IL Outlet Note Regular Brands Quest Diagnostics Illinois Elgin Rating 4.7 based on 66 votes Products STD Testing Clinical Laboratory Services Drug Test Blood Test NameAddressPhone Name/Address/Phone Quest Diagnostics outlet - Elgin 484 Summit St (847) 841-1377 Quest Diagnostics outlet - Elgin 750 Fletcher Dr, Ste 202 (847) 214-2773 Quest Diagnostics outlet - Elgin 750 Fletcher Dr, #202 (847) 214-2773 People Also Viewed