Ohio Revised Code Title XXXIX. Insurance § 3923.81

(A) If a person is covered by a health benefit plan issued by a sickness and accident insurer, health insuring corporation, or multiple employer welfare arrangement and the person is required to pay for health care costs out-of-pocket or with funds from a savings account, the amount the person is required to pay to a health care provider or pharmacy shall not exceed the amount the sickness and accident insurer, health insuring corporation, or multiple employer welfare arrangement would pay under applicable reimbursement rates negotiated with the provider or pharmacy. This division does not preclude a person from reaching an agreement with a health care provider or pharmacy on terms that are more favorable to the person than negotiated reimbursement rates that otherwise would apply as long as the claim submitted reflects the alternative amount negotiated, except that a health care provider or pharmacy shall not waive all or part of a copay or deductible if prohibited by any other provision of the Revised Code. The requirements of this division do not apply to amounts owed to a provider or pharmacy with whom the sickness and accident insurer, health insuring corporation, or multiple employer welfare arrangement has no applicable negotiated reimbursement rate.

(B) Each sickness and accident insurer, health insuring corporation, or multiple employer welfare arrangement shall establish and maintain a system whereby a person covered by a health benefit plan may obtain information regarding potential out of pocket costs for services provided by in-network providers.

(C) As used in this section: