The following facilities provide general medical services such as cardiology (heart care), orthopedics (knee and hip), and so on. Most are large hospitals, though in some cases the services are provided by a specialty clinic. This site has pages dedicated pages for facilities providing plastic surgery, vision, or dental care; for all other types of medical treatment, including specialties such as fertility treatment (e.g. IVF) or addiction recovery, consult the facilities on this page.
Though the mention of "medical tourism" conjures up visions of cheap angioplasty or hip replacement surgery, by researching hospitals overseas you will see that many are providing services at or above the level in your home country. JCI accreditation means that a hospital has been certified to provide services to international standards.