Those events include:

• Getting married
• Having or adopting a child
• Permanently moving to a new area that offers different health plans
• Losing other health coverage because of job loss, divorce, loss of eligibility for Medicaid or the Children's Health Insurance Program, expiration of COBRA coverage or decertification of a health plan. (A plan is decertified if it no longer meets federal and state standards for health plans.) Losing coverage because you didn't pay the premiums does not qualify you for special enrollment.
• A change in your household that affects eligibility for tax credits or cost-sharing subsidies.