Ohio Rev. Code § 4507.20
The registrar of motor vehicles, when the registrar has good cause to believe that the holder of a driver's or commercial driver's license is incompetent or otherwise not qualified to be licensed, shall send a written notice to the licensee's last known address, requiring the licensee to submit to a driver's license examination, a physical examination, or both, or a commercial driver's license examination within the time indicated on the notice. The physical examination may be conducted by any individual authorized by the Revised Code to do so, including a physician assistant, a clinical nurse specialist, a certified nurse practitioner, or a certified nurse-midwife. Any written documentation of the physical examination shall be completed by the individual who conducted the examination.
Upon the conclusion of the examination, the registrar may suspend the license of the person, may permit the licensee to retain the license, or may issue the licensee a restricted license. Refusal or neglect of the licensee to submit to the examination is ground for suspension of the licensee's license.
A physician licensed under Chapter 4731. of the Revised Code may submit a report to the registrar stating that in the physician's professional opinion the holder of a driver's or commercial driver's license may be incompetent or otherwise not qualified to operate safely a motor vehicle due to medical reasons. Any such report submitted to the registrar is confidential, is not a public record, and is not subject to disclosure under section 149.43 of the Revised Code.
R.C. §4507.20