Ohio Rev. Code § 5121.33: Billing cycle charges to patient or relative.

(A) Except as provided in sections 5121.35, 5121.43, 5121.46, 5121.47, 5121.49, and 5121.52 of the Revised Code, the department of mental health and addiction services shall, for each billing cycle, charge a patient, patient's estate, or liable relative the amount calculated under division (B) of this section for care and treatment the patient receives in a hospital operated by the department.

(B) The amount to be charged under division (A) of this section shall be calculated by multiplying the hospital's per diem charge or ancillary per diem rate determined under section 5121.32 of the Revised Code, whichever the department determines applies, by the number of days the patient was admitted to the hospital during the period that is covered by the billing cycle.