Why do the incident date and the report date differ?

Companies usually investigate before they report. The gap between the two dates shows how long that took.

What does the records-affected figure count?

It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.

Does this case file change over time?

Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

Case file

Case File: Mass General Brigham Medical Group - Harbor Medical Associates Data Breach

This file collects the dated facts on record for the Mass General Brigham Medical Group - Harbor Medical Associates incident. The state report is dated February 28, 2025.

Timeline

February 28, 2025Report filed in MassachusettsDate the notice was lodged with the Massachusetts Attorney General.

Case facts

Filing state: Massachusetts
Date reported: February 28, 2025
Receiving office: Massachusetts Attorney General

Case notes

On February 28, 2025, Mass General Brigham Medical Group - Harbor Medical Associates, a healthcare provider operating in Massachusetts, filed an official notice regarding a data security incident. The organization reported this event to regulators, indicating that an investigation into the nature and extent of the breach is currently underway.

While specific details about the breach type and the exact categories of information involved have not been publicly disclosed, the filing confirms that personal data managed by the medical group was affected. As a comprehensive healthcare provider, Mass General Brigham Medical Group - Harbor Medical Associates routinely handles a wide array of sensitive personal information related to patient care and administration.

For individuals whose information was impacted, this means that their personal details may have been accessed without authorization. The full scope of the exposure and the number of people affected remain part of the ongoing investigation, as indicated in the public record.

Upon receiving a direct notification letter from Mass General Brigham Medical Group - Harbor Medical Associates, individuals should carefully review its contents. It is generally recommended to remain vigilant for unusual activity across personal accounts and to consider placing a fraud alert or freezing credit with major credit bureaus as a proactive measure. Regularly monitoring statements and reports can help detect potential misuse of information.

Details regarding this incident are derived from the official regulatory filing made by Mass General Brigham Medical Group - Harbor Medical Associates, which serves as a public record of the reported security event.

Questions about this case file

Where does the Mass General Brigham Medical Group - Harbor Medical Associates case file come from?: Every entry is taken from the breach report Mass General Brigham Medical Group - Harbor Medical Associates lodged with the Massachusetts Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?: Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?: It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?: Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

Massachusetts data breaches

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Timeline

Case facts

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