Rockville, Maryland 20850 301-444-4402. Comprehensive Primary Care - Rockville 15825 Shady Grove Road, Suite 140 Rockville, Maryland 20850 301-869-9776. Johns Hopkins Community Physicians - Germantown 20500 Seneca Meadows Parkway, Suite 2400 Germantown, MD 20876 240-912-2738. Rockville Internal Medicine Group 1201 Seven Locks Road, Suite ....