Oncologists are calling on Congress to pursue SGR repeal before a spike in demand for cancer care hits the U.S. health system.
The proposals had been universally panned by lawmakers and K Street.
The move pits the labor movement against insurers, doctor groups and Republican lawmakers.
Three House GOP bills could attract significant Democratic support this week.
Doctors are shooting down the effort to link a "doc fix" to an individual mandate delay.
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.