Iowa Admin. Code r. 721-25.18
25.18(1) Subpoenas issued in a complaint proceeding may compel the attendance of witnesses at depositions or hearing, and may compel the production of books, papers, records, and other real evidence. A command to produce evidence or to permit inspection may be joined with a command to appear at deposition or hearing, or may be issued separately. Subpoenas shall be issued by the presiding officer upon written request. In the case of a request for a subpoena of mental health records, the request must confirm compliance with the following conditions prior to the issuance of the subpoena:
25.18(2) A request for a subpoena shall include the following information, as applicable:
25.18(3) Each subpoena shall contain, as applicable: