Sterling Office. 46090 Lake Center Plaza Suite 104 Sterling, VA 20165 Get Directions. 703.421.1700 703.421.5550 Secure Message via Portal. Make an Appointment. Monday 8:30 am - 4:30 pm. Tuesday 8:30 am - 4:30 pm. Wednesday 8:30 am - 4:30 pm. Thursday 8:30 am - 4:30 pm..