Joann Collier Md 6830 Oregon Ave Nw Washington, DC 20015 Phone : (202) 291-7661 Business Category Physicians & Surgeons-M.D. Lawrence Manning Md 6323 Georgia Ave Nw Washington, DC 20011 Phone : (202) 291-7661 Business Category Physicians & Surgeons-M.D. Physicians & Surgeons-Orthopedic Surgery