ISRG stock drops 11% as Intuitive Surgical beats Q2 estimates but warns insurance changes could slow U.S. procedure growth.

Intuitive Surgical shares slid to a fresh 52-week low Tuesday, caught in a broader pullback across medical device names and pressured by a string of Wall Street price-target cuts.

Intuitive Surgical tumbled Tuesday after HCA Healthcare trimmed its full-year earnings outlook, noting a drop in surgeries.