Another case of identity theft has been reported:

Beginning in February, UC Irvine graduate students who attempted to submit income tax returns electronically were informed by the IRS that their had already been filed, provoking complaints to the UCI Police Department to solve the identity thefts. To date, all 155 reported victims were participants in UCI’s Graduate Student Health Insurance Program.

The investigation is underway. It seems to touch on HIPAA, but the article makes no mention of health records.