Ohio Rev. Code Ann. § 2335.061
(A) As used in this section:
(1) "Coroner" has the same meaning as in section 313.01 of the Revised Code, and includes the following:
(B)
(1) A party may subpoena a coroner or deputy coroner to give expert testimony at a trial, hearing, or deposition in a civil action only upon filing with the court a notice that includes all of the following:
(E) In the event of a dispute as to the contents of the notice filed by a party under division (B) of this section or as to the nature of the testimony sought from or given by a coroner or a deputy coroner at a trial, hearing, or deposition in a civil action, the court shall determine whether the testimony sought from or given by the coroner or deputy coroner is expert testimony or fact testimony. In making this determination, the court shall consider all of the following: