Medicare beneficiary advocates hope bicameral legislation designed to protect seniors with Medicare Advantage plans from losing their doctors mid-year due to network narrowing will spark a national dialogue over how and when insurers can cut physicians from provider networks and ultimately spur CMS to make the process more transparent, while insurers say there are already plenty of consumer protections in place. Legislation introduced in the House and Senate in late-June would limit insurers to dropping physicians from their provider networks...