Iowa Admin. Code r. 11-7.10
7.10(1) Consolidation. The presiding officer may, upon motion by any party or the presiding officer’s own motion, consolidate any or all matters at issue in two or more contested case proceedings where:
c. Consolidation would not adversely affect the rights of parties to those proceedings.
At any time prior to the hearing, any party may on motion request that the matters not be consolidated, and the motion shall be granted for good cause shown.