To amend the Patient Protection and Affordable Care Act to prevent duplicate enrollments in Exchanges.

HR 6515 requires the federal government to establish a verification process within 60 days to check if the same Social Security number is used by multiple individuals enrolling in health insurance through federal or state Exchanges for the same coverage period. If duplicates are identified, it prevents duplicate payments of government premium tax credits (advance payments) for the same person. The bill directly affects individuals using health insurance Exchanges and the agencies managing those systems. It creates a concrete administrative mechanism to stop accidental overpayments of tax credits.