Requires regular collection of air‑ambulance cost and utilization data from providers and suppliers every three years, directs the HHS Secretary to use that data (with stakeholder input and a transparent process) to revise the Medicare air‑ambulance fee schedule, mandates that the Secretary finalize a data‑collection rule within six months of enactment, and orders the Government Accountability Office to report to Congress within one year after data collection begins on emergency air‑ambulance costs and related topics.