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Social security numbers stolen from Tufts Health members

Federal officials are investigating the theft of personal data of about 8,830 former and current members of a Tufts Health Plan insurance plan, including names, birth dates, and Social Security numbers but not medical, health, or financial information, the insurer said.

Tufts Health Plan said the victims were among those who had purchased Tufts Medicare Preferred policies, including supplemental Medicare coverage and a prescription drug plan. Tufts Medicare Preferred has about 127,000 members.

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Tufts Health Plan said the theft “was not due to an electronic breach, IT system vulnerability or hacking.” But it did not explain further.

A spokeswoman said only that “it’s under active investigation” by federal officials.

The insurer will be offering year-long credit monitoring and identity-theft protection to victims of the theft.

“We can not convey strongly enough our regret that this incident occurred,” Tufts Health said. “As soon as we learned of this situation, we took immediate action.”

Robert Weisman can be reached at robert.weisman@globe.com. Follow him on Twitter @GlobeRobW.
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