Iowa has reciprocity with Arkansas, Georgia, Louisiana, Massachusetts, Minnesota, Mississippi, or North Dakota. These states have a pathway to licensure through reciprocity.
Any other state will have to follow the same steps as any Iowa unlicensed resident, except some licensees can apply for a waiver to skip the 60-hour pre-license course and taking the national portion of the Iowa licensing exam.
193E Iowa Administrative Code § 5.3 applies to license holders except those in California, Florida, New York, West Virginia, in Wisconsin. If your original license is from one of these states, you have to sit the whole examination, but you can skip the 60-hour pre-license course.