HCA Healthcare, Inc. is a health care services company. It owns, manages or operates hospitals, ambulatory surgery centers (ASCs), freestanding emergency care facilities, urgent care facilities, walk-in clinics, diagnostic and imaging centers, radiation and oncology therapy centers, comprehensive rehabilitation and physical therapy centers, hospices, and various other facilities. Its general, acute care hospitals provide a full range of services to accommodate such medical specialties as internal medicine, general surgery, cardiology, oncology, neurosurgery, orthopedics and obstetrics, as well as diagnostic and emergency services. Its behavioral hospitals provide a full range of mental health care services through inpatient, partial hospitalization and outpatient settings. It operates approximately 190 hospitals and 2,400 ambulatory sites of care, including surgery centers, freestanding emergency rooms, urgent care centers and physician clinics, in 20 states and the United Kingdom.