The U.S. Supreme Court is expected to announce its ruling on the federal health care law Thursday morning.
That decision will impact Oklahoma.
State officials have done little to comply with the law and are gambling that a key provision will be struck down.
GOP leaders cite fears of a federal takeover of health care in declining to set up a state-run health insurance exchange.
If the law is upheld and the state doesn't create its own exchange by November, the state would automatically be absorbed into the federal system, which is what lawmakers were trying to avoid.