Data Breach WatchDBW

Healthcare

Medium

investigation open

Updated about 1 month ago

Petaluma Health Center Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving Petaluma Health Center.
•Discovered on December 15, 2025.
•Possible data exposed: Names, Social Security numbers, Dates of birth, Contact information, Health insurance member numbers, Medicare beneficiary numbers, Health insurer names, Information about primary insured or beneficiary, Health-related information, Insurance information, Demographic health details, Health insurance details, Name, Date of Birth, Address, Phone Number, Email Address, Race/Ethnicity, Social Security Number, Dental Records, Protected Health Information, Health Insurance Information.
•Affects individuals in: California.
•Confirmation level: Confirmed by company.

Breach confirmed

The Petaluma Health Center breach is confirmed. If you may be affected, add your details below and we will take it from there.

Detailed summary

Petaluma Health Center, a federally qualified health center based in California, experienced a ransomware data breach. The incident, which came to light around late 2025 or early 2026, involved sensitive personal and protected health information.

The breach is estimated to have affected approximately 125,000 individuals. Data types likely exposed include names, dates of birth, addresses, phone numbers, email addresses, race/ethnicity, Social Security numbers, dental records, and other protected health information. The full extent of the affected data types and individuals is still being understood as investigations proceed, and the company has not made a specific public statement regarding the number of individuals involved.

Data breach investigations can be complex, and additional details may emerge as the situation unfolds. Notification processes may also be delayed in some cases.

Data possibly involved

Names
Social Security numbers
Can be used to open fraudulent accounts and file false tax returns
Dates of birth
Contact information
Health insurance member numbers
Could be used for insurance fraud
Medicare beneficiary numbers
Health insurer names
Information about primary insured or beneficiary
Health-related information
Insurance information
Demographic health details
Health insurance details
Could be used for insurance fraud
Name
Date of Birth
Often used in combination with other data for identity theft
Address
Could be combined with other data for identity theft
Phone Number
May be used for SIM swapping or targeted scam calls
Email Address
Increases risk of phishing attacks and account takeovers
Race/Ethnicity
Social Security Number
Can be used to open fraudulent accounts and file false tax returns
Dental Records
Protected Health Information
Health Insurance Information
Could be used for insurance fraud

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 Petaluma Health Center breach? Check your email

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Check Your Risk Level

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

Do you use Petaluma Health Center?

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