ANAHEIM (AP) — Kaiser Permanente has warned 49,000 patients that a computer flash drive containing some of their private details has gone missing from the Anaheim Medical Center.

The health care provider says the drive was reported missing in September from a secure area of the nuclear medicine department and may have been misplaced.

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The drive was a backup that contained unencrypted data on patient names, birth dates and medication details — but not Social Security numbers. Patients were notified of the loss last week.

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Kaiser Permanente says there’s no reason to believe the information has been used for criminal activity but it’s asked patients to review their medical statements to be sure the information hasn’t been misused.

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