Indiana Code Title 4. State Offices and Administration § 4-21.5-3-22

Sec. 22. (a) The administrative law judge at the request of any party or an agency shall, and upon the administrative law judge's own motion may, issue:

in accordance with the rules of procedure governing discovery, depositions, and subpoenas in civil actions in the courts.

(b) The party seeking the order shall serve the order in accordance with these rules of procedure.  If ordered by the administrative law judge, the sheriff in the county in which the order is to be served shall serve the subpoena, discovery order, or protective order.

(c) Subpoenas and orders issued under this section may be enforced under IC 4-21.5-6.