Data Breach WatchDBW

Healthcare

High

investigation open

Updated about 1 month ago

Palomar Health Medical Group Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving Palomar Health Medical Group.
•Discovered on March 11, 2026.
•Possible data exposed: Names, Addresses, Dates of birth, Social Security numbers, Credit/debit card details, Email addresses, Usernames, passwords, Medical history, Health insurance information, Medical record numbers, Diagnoses, Prescriptions, Physician information, Disability information, Subscriber/plan numbers, Security code/PIN, Expiration date information.
•Affects individuals in: California.
•Confirmation level: Confirmed by regulators.

Breach confirmed

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

Detailed summary

Palomar Health Medical Group (PHMG) reported a data breach in 2026 affecting data stored by a business associate. PHMG posted a notice on its website confirming suspicious activity around March 11, 2026, in its vendor's hosted environment. The incident reportedly did not impact PHMG's internal systems.

This breach may have exposed a wide range of sensitive personal and health information. This includes names, addresses, dates of birth, Social Security numbers, credit/debit card details, email addresses, usernames, passwords, and various medical data such as medical history, diagnoses, and prescription information. The exact number of individuals affected has not been publicly disclosed.

A class action lawsuit, Mills v. Palomar Health Medical Group, was filed in the District Court, S.D. California on October 27, 2025. This indicates active litigation related to the breach.

Data possibly involved

Names
Addresses
Could be combined with other data for identity theft
Dates of birth
Social Security numbers
Can be used to open fraudulent accounts and file false tax returns
Credit/debit card details
May result in unauthorized charges on your accounts
Email addresses
Increases risk of phishing attacks and account takeovers
Usernames
passwords
Attackers may try to access other accounts using the same credentials
Medical history
Health insurance information
Could be used for insurance fraud
Medical record numbers
Diagnoses
Prescriptions
Physician information
Disability information
Subscriber/plan numbers
Security code/PIN
Expiration date information

Company Response Timeline

Breach Occurred

Mar 11, 2026

Company Discovered

Mar 11, 2026

Regulator Notified

Unknown

Consumers Notified

Unknown

0 days to discover

Breach Verification Status

Reports Only

Complete

Initial dark web reports of potential breach

Company Confirmed

Complete

Company has acknowledged the breach

Regulator Confirmed

Current

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.

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Check Your Risk Level

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

Do you use Palomar Health Medical Group?

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.

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