( September 10, 2024, 2:56 PM EDT) -- OAKLAND, Calif. — A California federal magistrate judge on Sept. 9 granted in part a health system’s motions to exclude expert testimony of relator’s witnesses in a qui tam suit alleging that the defendants violated the federal False Claims Act (FCA) and similar California law by paying kickbacks to certain physician groups, finding that certain portions of testimony should be excluded, including one witness’s opinion that a medical group was double billing....