List of Quest Diagnostics Stores in Lake Barrington, IL Outlet Note Regular Brands Quest Diagnostics Illinois Lake Barrington Rating 4.7 based on 66 votes Products STD Testing Clinical Laboratory Services Drug Test Blood Test NameAddressPhone Name/Address/Phone Quest Diagnostics outlet - Lake Barrington 22285 N Pepper Rd, Ste S-107 (847) 842-0486 People Also Viewed