1. Factors contributing to reductions in patient wait times at Indian Health Service emergency department facilities: a mixed-methods assessment Publication: Washington, D.C. : Office of the Assistant Secretary for Planning and Evaluation, Office of Health Policy, 2023 Subject(s): Access to Primary Care -- statistics & numerical dataEmergency Medical Services -- standardsEmergency Service, Hospital -- standardsPrimary Health Care -- standardsWaiting ListsUnited StatesUnited States. Indian Health Service.