New questions were added to the Health Insurance section of the NHIS Family core in 2014 to obtain details about whether plans (both private and public) were obtained through Healthcare.gov or the person's state Health Insurance Marketplace, whether there is an enrollment fee or premium (public plans only), and whether the premium is based on income (expanded to include public plans).

This follow-up information is now collected for all types of private and public plans and is intended to help correctly classify plans that may have come through the Federal Health Insurance Marketplace or state-based exchanges. This acknowledges that some respondents perceive exchange coverage as a public program and others perceive exchange coverage as private health insurance.

For persons who were reported to be covered by public plans, respondents were asked if they obtained this coverage through Healthcare.gov, the Health Insurance Marketplace, or the name of their state's exchange. In general, if a person was reported to have obtained insurance through an Exchange (or to have obtained insurance elsewhere), the reported coverage is taken to be accurate unless some other information clearly contradicts that finding (e.g. a person with a private plan whose plan name does not match those offered through the person's Marketplace).