The US Senate has unveiled a health care reform bill that has cost almost $900 billion approximately.

Senate Majority Leader Harry Reid addressed a press conference on Wednesday that the overhaul health care reform bill would enhance health insurance coverage to 30 million more Americans, Xinhua reported.

Referring to an analysis by the Congressional Budget Office, Reid, a Democrat, said that the bill was estimated to cost $849 billion over 10 years but it can decrease the federal shortfall by $127 billion in the first decade and more than $600 billion in the following decade.

The bill merges two separate drafts approved by Senate committees and will be sent to the whole floor for debate and vote, Reid said.

The long-awaited bill was at last made public after Reid held a close-door meeting with Senate Democrats, Wednesday afternoon, though its details remained unknown.

US media reports cited sources in the Senate as saying that public option, one of the most controversial subjects about the health care reform, is included in the Senate bill, but states reserve their right to opt out after the bill is put into place.

The House of Representative granted its health care reform bill on November 7.