Bureau Home / Identity Theft / Data Breaches
Listed below are data breaches which were either reported to DATCP, or have been identified as affecting Wisconsin consumers, within this calendar year. Information is gathered on each breach and posted to this page in order to inform consumers of any services or resources that are being offered. To find details on past data breaches (2012-2023), refer to DATCP's
data breach archive.
If you are concerned about being or becoming a victim of identity theft as a result of a data breach, contact the Bureau of Consumer Protection at (800) 422-7128 or DATCPHotline@wisconsin.gov.
May 2024
Company Name: AT&T
Date of Incident: June 2022
Date Public Notified: March 30, 2024
Data Accessed: The information varied by individual and account, but may have included full name, email address, mailing address, phone number, social security number, date of birth, AT&T account number and AT&T passcode
Who is Affected: Current and former customers
Number of Individuals Affected: 7.6 million current customers and 65 million former customers
Number of Wisconsin Residents Affected: Unknown
Who and how to contact if consumers have questions or need additional information: Complementary credit monitoring, identity theft detection and resolution services are being offered. AT&T asks customers with questions to call (1-866) 346-0416 Monday through Friday, 8 a.m. to 9 p.m. CST, or visit
att.com/accountsafety.
Company Name: Group Health Cooperative of South Central Wisconsin (GHC-SCW)
Date of Incident: On or before January 25, 2024
Date Public Notified: February 9, 2024
Data Accessed: Names, Social Security numbers, addresses, telephone numbers, e-mail addresses, dates of birth and/or death, member numbers, and Medicare and/or Medicaid numbers.
Who is Affected: Current and past members and patients of its providers
Number of Individuals Affected: 533,809
Number of Wisconsin Residents Affected: Unknown
Who and how to contact if consumers have questions or need additional information: Consumers with questions can call member services at (800) 605-4327. Consumers who think they may have been affected but did not receive a notification letter can contact
privacy@ghcscw.com or call (608) 662-4899.
January 2024
Company Name: Navvis & Company
Date of Incident: Between July 12 and July 25, 2023
Date Public Notified: Rolling notices beginning September 22, 2023
Data Accessed: Names, account numbers, birthdates, diagnoses/clinical information, health insurance policy numbers, medical date of service, medical provider names, medical treatment/procedure information, and patient account numbers.
Who is Affected: Patients
Number of Individuals Affected: Unknown
Number of Wisconsin Residents Affected: 316,043
Who and how to contact if consumers have questions or need additional information: Credit monitoring for 12 months through IDX is being offered. Call (1-888) 996-4022 or visit the IDX website.