1. Loss of Employer Coverage 2. Moving to a New Address 3. Loss of Medicaid Eligibility 4. Getting Coverage Through a New Medicare Advantage or Part D Plan 5. Gaining/Losing Eligibility for Extra Help (Low-Income Subsidy) 6. Leaving Incarceration 7. Institutionalized (e.g., Nursing Home or Long-Term Care) 8. Plan Termination 9. Medicare Contract Violation or Misleading Information 10. Natural Disasters or Emergencies (FEMA-Declared) 11. Trial Rights 12. Dual Eligible (Medicare + Medicaid) 13. Other Exceptional Circumstances