Centennial Medical Group is a group practice with 9 locations. Currently, Centennial Medical Group 's 27 physicians cover 27 specialty areas of medicine. Centennial Medical Group Office Locations. Showing 1-5 of 9 Locations. Centennial Medical Group. 8186 Lark Brown Rd Ste 201 Elkridge, MD 21075 (410) 730-3399. Doctor.webmd.com..