HCA Healthcare, Inc. is a health care services company engaged in operating hospitals, freestanding surgery centers and emergency care facilities, urgent care facilities, walk-in clinics, diagnostic and imaging centers, radiation and oncology therapy centers, comprehensive rehabilitation and physical therapy centers, physician practices, home health, hospice, outpatient physical therapy home and community-based services providers, and various other facilities. The company is headquartered in Nashville, Tennessee and currently employs 220,000 full-time employees. The company went IPO on 2010-12-28. The firm owns, manages or operates hospitals, freestanding surgery centers, 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, physician practices, home health, hospice, outpatient physical therapy home and community-based services providers, and various other facilities. The company also operates outpatient health care facilities, which include freestanding ambulatory surgery centers (ASCs), freestanding emergency care facilities, urgent care facilities, walk-in clinics, diagnostic and imaging centers, comprehensive rehabilitation and physical therapy centers, radiation and oncology therapy centers, physician practices and other facilities. The company operates about 186 hospitals, comprised of 178 general, acute care hospitals, six behavioral hospitals and two rehabilitation hospitals.