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Mid Michigan Medical Billing Service Data Breach Lawsuit Investigation
Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in data breach cases, is investigating the Mid Michigan Medical Billing Service, Inc. data breach.
If you were affected by the data breach, your sensitive personally identifiable information may have been exposed, and you may be eligible for compensation.
About Mid Michigan Medical Billing Service, Inc.
Mid Michigan Medical Billing Service, Inc. (MMMBS) is a revenue cycle management company based in Flint, Michigan. Founded in 1999, the company provides billing support and administrative services to healthcare organizations of various sizes.
MMMBS handles a range of services including medical billing, records management, consultation, credentialing, electronic medical records training and financial reviews.
What Happened?
In March 2025, MMMBS detected suspicious activity on its IT network. After taking systems offline and launching an investigation, it was determined that an unauthorized third party had accessed the network on March 27, 2025.
During this breach, files were copied and potentially viewed. The investigation confirmed that sensitive information belonging to more than 28,000 individuals was compromised.
The breach was publicly announced on Jan. 2, 2026, and reported to the U.S. Department of Health and Human Services on Jan. 5, 2026.
Alarmingly, the Qilin ransomware group claimed responsibility, stating they obtained 38 GB of data and threatened to publish it on the dark web.
Information Exposed
- Names
- Social Security numbers
- Dates of birth
- Driver’s license numbers or government-issued identification numbers
- Medicare/Medicaid identification numbers
- Diagnosis and treatment information
- Medical record numbers and patient account numbers
- Health insurance information
- Payment card numbers
- Employer identification numbers
- Passport numbers
- Treating and referring provider names
- Biometric data
Your Rights and Next Steps
If you received a notification about this breach, it is important to understand your rights and the actions you can take to protect yourself. Under U.S. law, everyone is entitled to one free credit report annually from each of the three major credit bureaus: Equifax, Experian and TransUnion.
You also have the right to place a fraud alert or a credit freeze on your credit file at no cost. A fraud alert makes it harder for identity thieves to open accounts in your name, while a credit freeze restricts access to your credit report entirely. Both options are free and can be set up by contacting the credit bureaus directly.
If you notice any suspicious activity on your accounts or credit reports, report it immediately to your financial institutions, healthcare providers and the credit bureaus.
You May Be Entitled to Compensation
If your personal information was compromised in the Mid Michigan Medical Billing Service, Inc. data breach, you may be eligible for compensation. Lawyers are ready to help individuals affected by this incident seek justice and potential financial recovery for damages such as time spent dealing with the breach, identity theft risks and emotional distress.
To find out if you qualify and to join others in a potential lawsuit, complete the below form. This is a no-cost, no-obligation opportunity to have your case reviewed and to protect your rights.
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