From the Wall Street Journal news item:

In a twist on identity theft, crooks are using personal data stolen from millions of Americans to get health care, prescriptions and medical equipment.

Victims sometimes only find out when they get a bill or a call from a debt collector. They can wind up with the thief’s health data folded into their own medical charts. A patient’s record may show she has diabetes when she doesn’t, say, or list a blood type that isn’t hers—errors that can lead to dangerous diagnoses or treatments.

Adding insult to injury, a victim often can’t fully examine his own records because the thief’s health data, now folded into his, are protected by medical-privacy laws. And hospitals sometimes continue to hound victims for payments they didn’t incur.

Read the full piece here:
http://www.wsj.com/articles/how-identity-theft-sticks-you-with-hospital-bills-1438966007