Nov 5 (Reuters) - A close vote is expected on a sweeping U.S. healthcare overhaul bill in the House of Representatives on Saturday. Here are the main provisions of the bill.

INSURANCE MARKET CHANGES

* Creates an insurance market exchange where individuals and small businesses would purchase coverage. Sets minimum benefit packages that may be offered through the exchange.

* Creates a new government health insurance plan that would be sold through the exchange.

* Provides for the creation of nonprofit healthcare cooperatives that would sell coverage through the exchange.

* Bars insurers from excluding people for pre-existing conditions and from charging more based on medical history.

* Creates a temporary national high-risk pool program to provide medical coverage to the uninsured, including those with pre-existing conditions who have been denied coverage. The program would operate until the exchange becomes available.

* Young adults up to the age of 27 would be able to remain on their parents' health insurance policy.

* Provides for rebates for consumers if premiums far exceed the cost of covering their medical expenses.