Medical bills can be stressful. Some are surprises. Others are intimidatingly large. And many Americans just cannot pay on time. Now, a study in JAMA sheds light on just how much medical debt has been sent for collection in the United States.Researchers used data from a randomly selected group representing 10 percent of all people with TransUnion credit reports — about 40 million individuals — between 2009 and 2020. Though the average amount of medical debt fell to $429 by 2020, 17.8 percent of people had medical bills that were past due.The Washington Post, Read More.