Abraham Jewett  |  December 20, 2023

Category: Data Breach
Delta Dental signage, representing the Delta Dental data breach.
(Photo Credit: Rosemarie Mosteller/Shutterstock)

Delta Dental of California data breach overview: 

  • Who: Delta Dental of California and affiliates warned patients that nearly seven million were impacted by a May data breach that occurred as a result of a cyber attack on the MOVEit file transfer system. 
  • Why: Delta Dental of California said an investigation determined company information was accessed and acquired without authorization from between May 27 and May 30, 2023. 
  • Where: Delta Dental of California is headquartered in San Francisco, California. 

Delta Dental of California and affiliates disclosed that approximately 7 million of its patients may have had their personal data compromised as a result of the cyber attack on the MOVEit file transfer system earlier this year. 

Delta Dental of California says it learned about the attack on Progress Software’s MOVEit file transfer system on June 1, at which time the company said it launched a “thorough” investigation and took steps to “remediate the incident,” according to a data breach notification

“We stopped access to the MOVEit software, removed the malicious files, conducted a thorough analysis of the MOVEit database, applied the recommended patches and reset administrative passwords to the MOVEit system,” the Delta Dental of California data breach notification states. 

Delta Dental of California says its investigation determined information belonging to the company had been accessed and acquired without authorization between May 27 and May 30, 2023. 

A follow-up investigation completed in November placed the exact number of impacted at nearly 7 million and revealed the data breach exposed names, financial account numbers, credit and debit card numbers, and security codes, Bleeping Computer reports

Delta Dental of California urges affected patients to keep eye out for suspicious activity 

Delta Dental of California encourages patients who were affected by the data breach to “remain vigilant” by keeping an eye out for suspicious account activity and closely reviewing bank accounts and credit reports, among other financial statements. 

The company says it will reach out to impacted individuals to inform them about the data breach and provide details on specific services available to support them.

“[Delta Dental of California and affiliates] are deeply committed to protecting the information entrusted to us and take issues like this very seriously,” a statement from Delta Dental of California provided to Top Class Actions states. Immediately after being alerted of the incident, we took steps to contain and remediate the incident and protect our data. We also launched a thorough investigation, led by a team of independent third-party forensics, analytics and data mining experts, to determine what information was impacted and with whom it is associated.”

Delta Dental of California is offering 24 months of credit monitoring and identity theft protection services at no cost to patients impacted by the data breach, the statement says.

A class action settlement involving a dental support services provider, Smile Brands, was granted preliminary approval in August and resolved claims the company failed to prevent a 2021 data breach. 

Were you impacted by the Delta Dental of California data breach? Let us know in the comments.


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80 thoughts onDelta Dental of California data breach affects 7M

  1. Jason says:

    If the breach happened in June, why are we just learning about it 8 months later? I would like to be included if a class action proceeds.

  2. Ed Penning says:

    I was affected by this. How do I join the class action?

    1. Shelly Matenus says:

      I’m from NY and received a letter yesterday saying, “My Information was breached”. So I don’t know why it say’s California and not other states also? Please include me in All.

  3. Ashley says:

    Myself, husband, and kids were all affected. I also had someone attempt to open a credit card in my name in November, assuming it is related. Please add me!

  4. Dimitra Dimopoulos says:

    I think I might have been a victim of this and would like to be added.

  5. Paul Ellis says:

    I received a letter informing me said data breach included my DOB, SSN and my health insurance information. Please add me as well.

  6. Keli says:

    I received a letter! Please add me!

    1. Shelly Matenus says:

      I’m from NY and received a letter yesterday saying, “My Information was breached”. So I don’t know why it say’s California and not other states also? Please include me in All.

  7. Stacey kimery says:

    Add me please!

  8. TANISHA W TAYLOR says:

    I also received a letter this week about the breach. Please add me as well.

  9. Aruna Chetty says:

    I was sent a letter informing me of the data breach – my DB, SN and health insurance infor was leaked. Please add me to the lawsuit!

  10. Jenna Reed says:

    I received a letter saying my birth date social and name where accessed in the breach. Also received letter from Umpqua a few months back because they had a breach with the same Move it software

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