Global WASH in Healthcare Facilities Act of 2023 This bill requires the U.S. Agency for International Development (USAID) to implement an action plan to increase global access to safe water, sanitation, and hygiene (WASH) in healthcare facilities. USAID shall develop and submit to Congress such an action plan to (1) increase access to safe water in healthcare facilities; (2) enable handwashing at all points of care; (3) provide for the safe segregation, treatment, and disposal of healthcare and human waste; and (4) promote WASH behavior change.