MCNA Dental data breach impacts 8.9 million people after ransomware attack

Managed Care of North America Dental has published a data breach notification on its website, informing almost 9 million patients that their personal data were compromised.

MCNA Dental is one of the largest government-sponsored dental care and oral health insurance providers in the U.S. In a notice published Friday, MCNA says it became aware of unauthorized access to its computer systems on March 6th, 2023, with an investigation revealing that the hackers first gained access to MCNA’s network on February 26th, 2023.

The notices sent to impacted individuals enclose instructions on receiving 12 months of free identity theft protection and credit monitoring service through IDX. However, not every impacted individual will receive a notice as MCNA does not have current addresses for everyone; hence the organization published a substitute notice on IDX, which will stay online for 90 days.

The LockBit ransomware gang claimed the cyberattack on MCNA on March 7th, 2023, when the group published the first data samples stolen from the healthcare provider.

LockBit threatened to publish 700GB of sensitive, confidential information they allegedly exfiltrated from MCNA’s networks unless they were paid $10 million.

As the data is likely in the hands of other threat actors, all impacted users must monitor their credit reports for fraudulent activity and signs of identity theft.

Share this article on social media:

Subscribe to Our Newsletter!
Stay on top of cybersecurity risks, evolving threats and industry news.
This field is for validation purposes and should be left unchanged.

The Latest Cybersecurity News

From major cyberattacks, newly discovered critical vulnerabilities to recommended best practices, read it here first:

Tell us About your Needs
Get an Answer the Same Business Day

Got an urgent request? Call us at 1-877-805-7475 or Book a meeting.

What happens next:

A Vumetric expert will contact you to learn more about your cybersecurity needs and goals.

The project's scope will be defined (Target environment, deadlines, requirements, etc.)

A detailed quote including all-inclusive pricing and statement of work is sent to you.

This field is for validation purposes and should be left unchanged.


Everything You Need to Know

Gain confidence in your future cybersecurity assessments by learning to effectively plan, scope and execute projects.


Enter your Email Address

This field is for validation purposes and should be left unchanged.

* No free email provider (e.g:,, etc.)

This site is registered on as a development site. Switch to a production site key to remove this banner.