1860 Town Center Dr., Suite 255Reston, Va. 20190. Phone: (703) 707-0607. Fax: (703) 707-0949. Login to Patient Portal. Quality Internal Medicine is excited and proud to announce that Diane Lane Chow, RN, MSN, FNP-BC. is joining us to help care for our patients in meeting their health and medical care needs and goals. Learn more..