Data Breach WatchDBW

Healthcare

Medium

investigation open

Updated about 1 month ago

Mid Michigan Medical Billing Service Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving Mid Michigan Medical Billing Service.
•Discovered on January 1, 2026.
•Possible data exposed: SSN.
•Affects individuals in: Michigan.
•Confirmation level: Confirmed by company.

Breach confirmed

The Mid Michigan Medical Billing Service breach is confirmed. If you may be affected, add your details below and we will take it from there.

Detailed summary

In January 2026, Mid Michigan Medical Billing Service experienced a data breach stemming from a ransomware attack by the Qilin ransomware group. The company is classified as a business associate within the healthcare ecosystem.

The breach exposed Social Security numbers and potentially other personally identifiable information for 28,185 individuals. The full extent of data types compromised beyond Social Security numbers, official breach notification statements, and attorney general filings have not yet been publicly confirmed.

Additional documentation, such as formal breach notification letters, attorney general filings, and potential litigation, may emerge as the situation develops.

Data possibly involved

SSN
Can be used to open fraudulent accounts and file false tax returns

Company Response Timeline

Response Grade

Notified consumers within 30 days of discovery

Breach Occurred

Jan 1, 2026

Company Discovered

Jan 1, 2026

Regulator Notified

Unknown

Consumers Notified

Jan 1, 2026

0 days to discover

0 days to notify consumers

Breach Verification Status

Reports Only

Complete

Initial dark web reports of potential breach

Company Confirmed

Current

Company has acknowledged the breach

Regulator Confirmed

Confirmed by regulatory authorities

Note: Breach verification can take time. Information may evolve as more details become available from companies and regulators.

Case Status:

Investigation Open

We're actively investigating this case and seeking affected individuals.

Were you affected? Submit your information below.

Were You Affected By This Breach?

If you are a customer or have received a data breach notification, you may submit your information as part of our ongoing investigation. Submitting your information is free and does not obligate you.

Were you in the Mid Michigan Medical Billing Service breach? Check your email

Free scan against known breach datasets. Then remove your info from data-broker sites with Data Shield.

No signup required. 30-second scan. Your email is only stored if you opt into alerts.

Get your info off data-broker sites

Data Shield files removal requests with every broker that accepts an authorized agent, and gives you the exact link or letter for the brokers that only accept requests from you.

See how Data Shield works

Check Your Risk Level

Answer a few questions to understand how this breach might affect you

Do you use Mid Michigan Medical Billing Service?

Yes

What state are you in?

What should I do?

Change your passwords

Update passwords for the affected service and any accounts using the same password

Enable two-factor authentication

Add an extra layer of security to your accounts

Monitor your accounts

Watch for suspicious activity on your financial and online accounts

Watch for phishing attempts

Be cautious of emails or messages claiming to be from the affected company

Consider a credit freeze

Prevent unauthorized access to your credit report

Scan your email for other exposures

Check whether this address shows up in other known breaches. Free, no account.

Get your info off data-broker sites

Data Shield files removal requests with every broker that accepts an authorized agent, and gives you the exact link or letter for the brokers that only accept requests from you.

See how Data Shield works