His administration has appealed a judge's order to move ahead with the expansion plan that was approved by Maine voters.
LePage has long been an opponent of Medicaid expansion and has resisted the latest effort, saying he won't accept it until lawmakers find a way to fund it on his terms.
Advocacy groups sued in April to force LePage to submit paperwork to begin the implementation and a judge ruled last week the governor must comply.
LePage now is appealing to the state's highest court, claiming the judge's order is a violation of the state's constitution that calls for a separation of power.
If and when it is set in place, more than 70,000 Mainers stand to receive benefits under the proposed expansion.