If the person doesn't qualify as your dependent (e.g., an adult child over 26 or a friend), you can still help them get covered through the Health Insurance Marketplace: Who's included in your household | HealthCare.gov
Generally, friends, roommates, or parents cannot be added unless you claim them as a tax dependent , have legal guardianship, or provide more than half of their financial support. 2. Buying a Separate Marketplace Plan
You can typically add individuals to your existing policy if they meet specific eligibility criteria as a :
Biological, adopted, step, and foster children can stay on your plan until age 26, regardless of their marital or financial status.
Many employer-sponsored and some state-specific plans allow unmarried partners if you provide proof of cohabitation or shared finances.
We hope you’ll give the new products and updates a try. If you have an idea for improving our products or want to vote on other user ideas so they get prioritized, please submit your feedback on our Community platform. And if you have any questions, please feel free to ask in the Community or contact our Technical Support team.