<p>The National Hospital Ambulatory Medical Care Survey (NHAMCS) is designed to collect data on the utilization and provision
of ambulatory care services in hospital emergency and outpatient departments and in ambulatory surgery centers. Hospital-based
ambulatory surgery centers were first added to this study in 2009, and freestanding ambulatory surgery centers were added
in 2010.</p>
Citation
Title National Hospital Ambulatory Medical Care Survey