List of Quest Diagnostics Stores in Ellicott City, MD Outlet Note Regular Brands Quest Diagnostics Maryland Ellicott City Rating 4.7 based on 66 votes Products STD Testing Clinical Laboratory Services Drug Test Blood Test NameAddressPhone Name/Address/Phone Quest Diagnostics outlet - Ellicott City 9055 Chevrolet Dr, Ste 101 (410) 750-6485 People Also Viewed