Mayo Clinic has slipped to the number two ranking in the U.S. News & World Report’s 2015 Best Hospitals list released Tuesday.

TSM/Rochester

While ranked number one in last year's survey, Rochester's own Mayo Clinic has flipped spots with Massachusetts General Hospital, which was ranked number two last year.

According to BringMeTheNews.com, "The yearly analysis looks at the best medical centers for patients with life-threatening or rare conditions. The report analyzes factors that include patient survival rates, adequacy of the nursing staff, reputation with specialist physicians, and patient safety. It bases the hospitals on performance in 16 complex care specialties."

But the results appear to very, very close. The story went on to say:

"Mayo Clinic ranked nationally in 15 out of the 16 adult specialties, including a No. 1 ranking nationally in eight adult specialties:

  • Diabetes and endocrinology
  • Gastroenterology and GI surgery
  • Geriatrics
  • Gynecology
  • Nephrology
  • Neurology and neurosurgery
  • Pulmonology
  • Urology

This year’s best hospital – Massachusetts General Hospital in Boston – is ranked nationally in all 16 adult specialties, but is ranked No. 1 nationally in just one specialty: ear, nose and throat."