We are investigating a breach of customer data impacting Corewell Health and Pinnacle Holdings, LTD.
Posted on April 07, 2026
Overview of the Corewell Health / Pinnacle Holdings, LTD Data Breach
Barnow and Associates, P.C., a leading data breach litigation law firm, is investigating a recent cybersecurity incident involving Pinnacle Holdings, LTD that affected Corewell Health. This breach may have exposed sensitive personal and protected health information, potentially affecting 18,313 individuals.
If you received a data breach notification from Corewell Health or Pinnacle Holdings, LTD, our attorneys are here to help you understand your legal options.
Contact us today to discuss your rights and explore potential claims. Fill out our contact form or call us at (312) 621-2000.
About Corewell Health and Pinnacle Holdings, LTD
Corewell Health is a health system based in Grand Rapids, Michigan. Pinnacle Holdings, LTD is headquartered in Centennial, Colorado, a Denver suburb, and provides services related to healthcare operations.
Details of the Data Breach
Unauthorized access occurred between November 11 and November 25, 2024. Pinnacle reported the incident to the U.S. Department of Health and Human Services.
The investigation confirmed that the following information may have been exposed:
- names,
- addresses,
- phone numbers,
- email addresses,
- Social Security numbers,
- driver’s license or state ID numbers,
- taxpayer ID numbers,
- passport numbers,
- financial account information,
- payment card information,
- online account credentials,
- digital signatures,
- biometric data,
- dates of birth,
- medical treatment or diagnosis information,
- prescription information,
- dates of service,
- patient ID numbers,
- encounter ID numbers,
- provider names,
- patient account numbers,
- medical record numbers,
- Medicare/Medicaid numbers,
- health insurance information,
- health insurance claim numbers,
- health insurance policy numbers,
- treatment cost information.
Corewell Health and Pinnacle Holdings, LTD have begun notifying affected individuals.
What to Do If You Received a Data Breach Notification
If you were notified about the Corewell Health / Pinnacle Holdings, LTD data breach, you may be eligible to join a class action lawsuit. Contact Barnow and Associates, P.C. to discuss your legal rights. Complete our contact form below or reach us at (312) 621-2000.
Steps to Protect Your Personal Information
To safeguard your data after the Corewell Health / Pinnacle Holdings, LTD breach, consider the following steps:
- Review the Breach Notification: Carefully read the notice and retain it for your records.
- Enroll in Free Monitoring Services: If offered, consider signing up for complimentary credit or identity monitoring to detect suspicious activity.
- Update Passwords: Change passwords for online accounts, using strong, unique combinations.
- Monitor Financial Accounts: Regularly check bank and credit card statements for unauthorized transactions.
- Check Your Credit Report: Look for signs of identity theft by reviewing your credit history at AnnualCreditReport.com.
Potential Legal Outcomes for Affected Individuals
The Corewell Health / Pinnacle Holdings, LTD data breach may lead to class action lawsuits due to inadequate cybersecurity measures. Affected individuals could seek compensation for:
- Costs of credit monitoring or identity theft protection
- Unauthorized charges or financial losses
- Time and effort spent addressing the breach
- Other non-financial harms
Our firm has a proven track record in data breach litigation, securing significant settlements for clients. Learn more about our past case results.
How Barnow and Associates, P.C. Can Help
Barnow and Associates, P.C. is dedicated to holding companies accountable for failing to protect consumer data. By joining a class action lawsuit, you may recover compensation for damages while advocating for stronger data security practices.
You may be eligible for recoveries related to:
- Privacy Violations: Compensation for unauthorized access to your personal information
- Mitigation Efforts: Reimbursement for time and resources spent addressing the breach
- Financial Losses: Recovery for direct costs, such as fraudulent charges
- Non-Financial Harms: Damages for emotional distress or inconvenience
Contact us today to verify your eligibility and explore your legal options. Call (312) 621-2000 or fill out our contact form.
