The groups oppose facing cuts to pay for non-Medicare legislation.
The bill marks one of the biggest achievements yet from the newly GOP-controlled Congress.
“We need to pass it today, and I think most of our members understand that."
The House and Senate are back to work after a two-week spring recess.
Proponents fear the last-minute demands could sink the bill.
The so-called "doc fix" passed the House on Thursday.
A number of Senate Democrats are balking at package to prevent cut in physician payments.
Planned Parenthood opposes the Medicare deal over abortion provisions.
The senators are unhappy with a deal being brokered by John Boehner and Nancy Pelosi.
The biggest hurdle, the deal's price tag, is still uncertain.
Investigators recouped about $1 billion less in wasted dollars over the last year.
Pelosi all but predicts that a vote on the deal will happen.
What ever happened to the do-nothing Congress?
The Speaker said the House does "not plan to act again."
Senators will consider three proposals from Democrats and three from Republicans.
The Obama administration has twice backed away from cuts to Medicare Advantage.
The task force says country faces serious challenges with aging population.
Only a small group in the House opposed the $200 billion legislation.
The support comes despite concerns over children's heath insurance funding.
House and Senate Republicans will work on budgets and preventing cuts to Medicare payments.
They argue there is no purpose in proposing solutions that Obama will never support.
Sen. Chuck Grassley argues for leaving details out of budget plan.
The deal would repeal a formula used to pay doctors under Medicare.
Pelosi said "we are proceeding in a positive way" on Medicare payment formula deal.