From the New York Times:

A dispute over Medicare payments rates created a new complication on Friday for House Democratic leaders in their drive for major health care legislation, as crucial votes remained in play in both directions with barely 48 hours to go before an expected climactic vote.
The flare-up over Medicare, a dispute that has percolated throughout the yearlong health care debate, was just one in a series of fast-moving developments as the Democrats press toward a decisive vote on the House floor on Sunday. It came as rank-and-file lawmakers pored over the detailed legislative language released on Thursday, and a handful of representatives said their states were being short-changed by new provisions.
Representative Peter A. DeFazio, Democratic of Oregon, who voted in favor of the bill in November, warned on Friday that he would not support the current measure unless it increased Medicare payments to states like his that provide high-quality care and comparatively lower cost.
Speaker Nancy Pelosi acknowledged the concerns at a news conference on Friday morning, and said party leaders would work to address them. Lawmakers from Iowa, Minnesota, Oregon, Washington and Wisconsin, have been meeting with Ms. Pelosi in the hopes of reaching an accord.
As President Obama rallied supporters at George Mason University in northern Virginia, House leaders continued to pick up crucial support. Representative John Boccieri, Democrat of Ohio, a politically vulnerable freshman, became the latest opponent of the bill in November to announce that he would vote in favor it, saying he was “doing what I believe in.” He had opposed the House bill in November.