Dr. Tsien is especially interested in intensity-modulated radiation therapy (IMRT), gamma knife radiosurgery, and stereotactic body radiation therapy (SBRT). She is in-network for Anthem, Blue Cross/Blue Shield, and Coventry, as well as other insurance carriers. She obtained her medical school training at McGill University Faculty of Medicine and performed her residency at a hospital affiliated with McGill University. She is affiliated with Barnes-Jewish West County Hospital, Christian Hospital, and Washington University Physicians.