Northern California's Sutter Health East Bay Region recently announced that the Alameda County Sheriff's Department had notified one of Sutter Health's hospitals that it had recovered approximately 4,500 people's personal information during an unrelated investigation.

The information, which may have originated from Sutter Health's Alta Bates Summit, Sutter Delta or Eden medical centers, may have included patients' names, Social Security numbers, birthdates, genders, addresses, zip codes, home phone numbers, marital status, employer names, and work phone numbers.

Sutter Health says it has notified all patients whose information was potentially exposed, and is offering those patients with a free one-year membership in Experian's ProtectMyID identity theft protection service.

"We are concerned about this matter and take protecting our patients’ privacy very seriously," Sutter Health said in the announcement. "At this time we do not know how the information was obtained. We continue to cooperate with law enforcement to investigate this incident."

Patients with questions are advised to call (888) 414-8020 and enter the reference number 2789053113.