The nation's largest senior lobby said the administration should beef up the Medicare appeals process ahead of rolling out the reform.
House Republicans are cooking up a bill they hope will be a tough vote for Democrats.
Members of the GOP Doctors Caucus urged the administration to keep Medicare Advantage rates flat in 2015.
A wide-ranging coalition called for overhauling Medicare's physician payment system amid signs that lawmakers will pursue another patch.
Both parties are blasting the administration for proposing restrictions on some medications.
The proposal allocates $77.1 billion in discretionary spending for the Department of Health and Human Services.
The newly installed Senate Finance chairman made his first major remarks Tuesday on Medicare physician payment reform.
The imaging industry is touting itself as a contributor to lower healthcare costs.
The criticism represents a major blow to the overhaul initiative.
Democrats reacted to Boehner’s comment with some excitement.