I'm not sure if you live in the United States, but Mayo Clinic is probably a top 5 hospital system in the US. It is legendary. Just read the opening paragraph from Wiki: https://en.wikipedia.org/wiki/Mayo_Clinic

    The Mayo Clinic (/ˈmeɪjoʊ/) is a nonprofit American academic medical center focused on integrated health care, education, and research.[6] It employs over 4,500 physicians and scientists, along with another 58,400 administrative and allied health staff, across three major campuses: Rochester, Minnesota; Jacksonville, Florida; and Phoenix/Scottsdale, Arizona.[7][8] The practice specializes in treating difficult cases through tertiary care and destination medicine. It is home to the top-15 ranked Mayo Clinic Alix School of Medicine in addition to many of the highest regarded residency education programs in the United States.[9][10][11] It spends over $660 million a year on research and has more than 3,000 full-time research personnel.[12][13]

A little deeper:

    Mayo Clinic has ranked number one in the United States for seven consecutive years in U.S. News & World Report's Best Hospitals Honor Roll,[19] maintaining a position at or near the top for more than 35 years.