Delivering the weekly GOP address, Rooney said what he called the president's broken promises were a "breach of faith" with senior citizens.
The president has repeatedly promised seniors they could keep their doctors under the healthcare act, Rooney said. In his district, however, "seniors are now forced to drive an hour or more just to see a primary care doctor, let alone a specialist," he said.
To help pay for the law, Obama made deep cuts in Medicare Advantage, a program Rooney called "win-win" that helps seniors with low incomes and patients with chronic medical conditions.
The program enrolls about a third of all Medicare recipients, and insurers are expecting steep cuts when the administration announces the 2015 rates in a week, The Hill reported.
"This goes well beyond a glitch or a pocketbook issue," Rooney said. "This is a breach of faith. The president's promises have proven false for working families, and now they are proving false for our seniors as well."
Republican leaders sent a letter to Obama Thursday telling him changes must be made to the law, Rooney said.
He called on Democratic lawmakers to work with Republicans "so we can focus on better solutions that lower costs for all Americans, especially our parents and grandparents."
Under the Affordable Care Act, often referred to as Obamacare, about $200 billion is expected to cut from Medicare Advantage over the next 10 years. Supporters say the cuts counter a flaw with traditional Medicare.