This year, in the ongoing series "Health Care's Colossus," STAT says it documented how UnitedHealth (UNH) wielded its unrivaled physician empire to boost its profits and expand its influence, Rick Berke writes. After reviewing documents, data and speaking with dozens of clinicians, STAT reporters Casey Ross, Bob Herman, Tara Bannow, and Lizzy Lawrence say UnitedHealth has turned health care into an assembly line that treats millions of patients as products to be monetized.