Billing Medicaid for claims denied by medicaid managed care plans.

We have a claim denied for being out of network by a medicaid managed care plan. I'm trying to bill straight medicaid for it through epaces but keep getting the denial as below:

"(F2 ) - Finalized/Denial-The claim/line has been denied. (97 ) - Patient eligibility not found with entity. Note: This code requires use of an Entity Code. (PR ) - Payer"

Any ideas? I figured straight medicaid is payor of last resort so trying to get this paid.

Billing Medicaid for claims denied by medicaid managed care plans.