She is the Chair of the Health Analytics Center at the Columbia University Data Science Institute. Her research is in biomedical informatics, natural language processing, and data science. She develops techniques to support clinicians, patients, and health researchers in their information workflow by automatically extracting and making accessible information from large clinical datasets (e.g., the electronic patient record) and patient platforms (e.g., online health communities, and mobile apps). Her research relies on two types of methods: (1) she designs novel computational approaches that infer models of health phenomena and account for the specific biases of large health data; (2) she translates the learned models into actionable knowledge and robust systems within the healthcare ecosystem. Her work is funded primarily by NSF, NIGMS, NLM, and NCI.