Preventing Maternal Deaths Reauthorization Act of 2023 This bill reauthorizes through FY2028 and otherwise modifies federal support for state-based efforts to improve maternal mortality review committees; enhance surveillance of pregnancy-associated and -related deaths; and otherwise improve, and reduce disparities in, maternal health outcomes. The bill also requires the Centers for Disease Control and Prevention to annually disseminate best practices for preventing maternal mortality and morbidity to hospitals, professional societies, and perinatal quality collaboratives (i.e., networks of perinatal care providers and public health professionals that work to improve pregnancy outcomes through continuous quality improvement).