Having health insurance is no guarantee of avoiding medical debt, according to a recent study.About one-third of working-age Americans who have health insurance also have outstanding medical bills or debt, according to a Sept. 17 survey conducted by Commonwealth Fund, a private healthcare foundation.That includes people with an employer-sponsored health plan, an individual health plan, or Obamacare, according to the report.Hospitals are the main creditors, the survey found. Sixty-four percent of insured people with medical debt said it was from hospital services such as inpatient care, outpatient care, and emergency department care.Routine care added to the debt for many of...