Ohio Rev. Code § 4723.29
In addition to the powers conferred upon the board of nursing by Chapter 119. of the Revised Code, the board may subpoena witnesses and require their attendance, require the testimony of witnesses and require the production by witnesses of books, papers, public records, and other documentary evidence, and examine them as it may require in relation to any matter which it has authority to investigate, inquire into, or hear.
A subpoena for patient record information shall be issued only upon approval of the executive director of the board, and the president or another member of the board designated by the president, in consultation with the office of the attorney general. Before issuance of any such subpoena, the executive director and the office of the attorney general shall determine whether there is probable cause to believe that the complaint filed alleges a violation of this chapter or any rule of the board, that the records sought are relevant to the alleged violation and material to the investigation, and that the records cover a reasonable period of time surrounding the alleged violation.
Upon failure to comply with any subpoena issued by the board and after reasonable notice to the person being subpoenaed, the board may move for an order compelling the production of persons or records pursuant to Ohio Rules of Civil Procedure.
Each officer who serves such subpoena shall receive the same fees as a sheriff, and each witness who appears, in obedience to a subpoena, before the board, shall receive the fees and mileage provided for under section 119.094 of the Revised Code.
R.C. §4723.29