It appears that young adults are becoming more aware of their health insurance coverage more than a year after the passage of the Affordable Care Act in 2010.

An estimated 13.7 million young adults between the ages of 19 and 25 have stayed on or joined their parents' health plans since the law went to effect, according to a survey conducted by the Commonwealth Fund, a New York-based private foundation that supports health care coverage.

The 13.7 million that stayed or joined between November 2010 and November 2011 included 6.6 million young adults who likely would not have been able to do so prior to the passage of the law, the survey showed. The new law requires insurance plans that include dependent coverage to cover adult children until their 26th birthdays.