Dr. Tjahjana is a licensed Internal Medicine in VA. Graduated in 1995. Medical degree obtained from Universitas Padjadjaran. Completed residency training at Interfaith Medical Center. Currently practices at One Health Medical Care (One Health Medical Care), located at 1850 Town Center Dr, Reston, VA 20190. Dr. Tjahjana specializes in internal medicine, primary care.. In addition to English, Dr. Tjahjana speaks Mandarin.