Aetna, Nationwide, WellPoint Group Health Plans, Humana Medicare, Mutual of Omaha Insurance Company, Anthem Blue Cross Blue Shield via Concentra Preferred Systems

A lockbox holding personal
information of health insurance customers was stolen Oct. 26. Thieves
broke into an office building occupied by insurance company vendor,
Concentra Preferred Systems. The lockbox contained computer backup
tapes of medical claim data for Aetna and other Concentra health plan
clients. Exposed data includes member names, hospital codes, and either
SSNs or Aetna member ID numbers. SSNs of 750 medical professionals
were also exposed. Officials downplay the risk by stating that the
tapes cannot be used on a standard PC. UPDATE
(12/23/06): The lockbox also contained tapes with personal information
of 42,000 NY employees insured by Group Health Insurance Inc.)
UPDATE(1/24/07): Personal
data of 28,279 Nationwide's Ohio customers were also compromised.  2/11/10 Total changes to 396,279 to reflect final total of records breached in all of the affected companies.