Doctors say they need to accept patients with a variety of types of insurance in order for them to stay in businesses. iStockphoto hide caption

itoggle caption iStockphoto

Keeping patient records electronically, instead of on paper, didn't change how much hospitals charged per procedure, a study shows. But critics say billing errors can be more subtle. Roy Scott/Ikon Images/Corbis hide caption

itoggle caption Roy Scott/Ikon Images/Corbis

Dorothea Handron suffered an infection after a surgeon unknowingly pierced her bowel during a hernia operation. She became so ill that doctors placed her in a medically induced coma for six weeks. Jim R. Bounds/AP Images for Kaiser Health News hide caption

itoggle caption Jim R. Bounds/AP Images for Kaiser Health News

Doctors who bill the federal government for a lot of services may be gaming the system, but there also may be a reasonable explanation. Aslan Alphan/Getty Images hide caption

itoggle caption Aslan Alphan/Getty Images

Walter Bianco's liver is severely damaged by hepatitis C, but insurers had refused to pay for the medications that could cure him. Alexandra Olgin for NPR hide caption

itoggle caption Alexandra Olgin for NPR

Walter Bianco's liver is severely damaged by hepatitis C, but insurers had refused to pay for the medications that could cure him. Alexandra Olgin for NPR hide caption

itoggle caption Alexandra Olgin for NPR