Several provisions of the new healthcare law are expected to go into effect on Thursday, including the rule that health insurers can no longer deny coverage to individuals with pre-existing conditions and people younger than 26 years old, and can no longer impose lifetime limits on coverage.
President Obama has been advocating for the landmark legislation and spoke Wednesday from a home in suburban Virginia about the benefits of the law for families.
He also talked about the administration's stance that the healthcare law helps control the budget deficit.
Yet, several health insurers in California and some other states said that they will stop selling child-only policies, rather than comply with the new requirement that stops them from denying coverage to children with pre-existing conditions.
Democrats criticized the decision.