Ohio Rev. Code § 5160.371
In addition to the requirement of division (C) of section 5160.37 of the Revised Code to cooperate with the department of medicaid and county department of job and family services, a medical assistance recipient and the recipient's attorney, if any, shall cooperate with each medical provider of the recipient. Cooperation with a medical provider shall consist of disclosing to the provider all information the recipient and attorney, if any, possess that would assist the provider in determining each third party that is responsible for the payment or processing of a claim for medical assistance provided to the recipient. If disclosure is not made in accordance with this section, the recipient and the recipient's attorney, if any, are liable to reimburse the department or county department for the amount that would have been paid by a third party had the third party been disclosed to the provider by the recipient or the recipient's attorney.
R.C. § 5160.371