Tenet Healthcare has appointed Freda Lewis-Hall, executive vice president and chief medical officer of Pfizer, as a new independent director. With her appointment, Lewis-Hall becomes the board’s tenth member.

Lewis-Hall joined Pfizer as chief medical officer in 2009. In her role, she leads Pfizer Medical, the division responsible for ensuring the safe, effective and appropriate use of Pfizer’s products. She directs teams at Pfizer that oversee the quality and conduct of Pfizer’s clinical trials, provide medical information and clinical data, and manage collaborative work on patient-centered drug development and outcomes research, public-private research partnerships, and global public health campaigns.

Prior to joining the biopharmaceutical industry, she served as vice chairperson and associate professor of the Department of Psychiatry at Howard University College of Medicine and was an advisor to the National Institute of Mental Health.