HC Reform Update from Mark Sanna: For young Americans with no health insurance, Thursday was an important day: those younger than 26 were able to join their parents’ plans under the recently enacted health care overhaul. Previously, children were dropped from their parents’ policies what 19 or 23 if they were full time students. Young people make up the largest group of uninsured Americans, although they are healthier and cheaper to insure. And they are much less likely to vote.