IC 22-3-6-1 is amended to provide that medical service facility means a hospital (as defined in IC 16-18-2-179); a hospital based health facility (as defined in IC 16-18-2-180); and a medical center (as defined in IC 16-18-2-223.4). The term does not include a professional corporation (as defined in IC 23-1.5-1-10) comprised of health care professionals (as defined in IC 23-1.5-1-8) who render professional services or to a health care professional who bills for a service or product provided under worker’s compensation as an individual or a group practice.