House Democratic leaders prepared Thursday to unveil their version of U.S. healthcare reform, which several leaders said contains a more modest version of a public option.

This public option version reportedly would allow doctors to negotiate reimbursement rates with the federal government, CNN reported. The House bill reportedly would not allow states to opt out of offering a government-run health insurance option, as the Senate healthcare reform bill does.

House Speaker Nancy Pelosi of California has argued for a more "robust" public option favored by liberals that would link reimbursement rates for hospitals and providers to Medicare rates plus a 5 percent increase.

One Democratic aide told CNN that "the votes aren't there for robust public option, so that means we're looking at the other form of the public option."

Pelosi was to meet with House Democrats Thursday before a rally outside the U.S. Capitol to announce details of the measure. House Democratic leaders said they hope to send the bill to the floor by next week, with a final vote before Nov. 11, The New York Times said.

Democratic leaders said expect to get a final cost estimate Thursday from the Congressional Budget Office. Preliminary CBO estimates projected a bill with either version of the public option would be below the $900 billion cap President Barack Obama set for the 10-year cost.