The statute of limitations to collect a debt in Ohio is 15 years. I cant imagine why the AG would be involved in a collection action unless the medical provider was a state institution. You should contact the AG and request an explaination as well as an itemization of any alleged debt.
Generally, if you signed a form consenting to pay for services not covered by insurance, that agreement is a binding contract allowing the medical provider 15 years to sue you for any amounts owing. The Attorney General does collect medical bills for state hospitals such as OSU hospital and its affiliates as well as the doctors employed by OSU. They will deduct your outstanding bill from any state return you have coming.
This reply is not intended to create an attorney/client relationship and should not be relied upon in lieu of the opinions of retained counsel.