Iowa SF 2421 would have regulated utilization review organizations' use of artificial intelligence in prior authorization decisions and established peer review requirements for denials and downgrades. Division I prohibits UROs from using AI-based algorithms as the sole basis for denying, delaying, or downgrading a prior authorization request based on medical necessity, and requires that all denials and downgrades be made by a qualified reviewer (physician) or clinical peer with same-specialty expertise. Divisions II and III exempt cancer-related screenings and life-threatening inpatient conditions from prior authorization requirements. Division IV establishes procedural requirements for prepayment audits, including notification timelines, completion deadlines, and appeal rights for providers. The bill was withdrawn and did not advance.