Many medical services—for example, an MRI scan—are provided both in hospital outpatient departments (HOPDs) and community settings, such as physician offices and freestanding imaging or ambulatory surgical centers (ASCs). Services commonly provided in both settings include laboratory tests, physical therapy, outpatient surgery, standard and advanced imaging, physician visits, and noninvasive and invasive procedures, such as endoscopy or cardiac catheterization. Read more at the National Institute for Health Care Research (NIHCR)