HIPAA Breach Report for September 2025

The HIPAA Breach Report for September 2025 analyzes protected health information (PHI) breaches affecting 500 or more people as reported to the Department of Health and Human Services (HHS) in August 2025.

This report covers:

• HIPAA breaches ranked by people affected
• HIPAA breaches ranked by occurrence
• Year-over-year comparison
• Takeaways
• Full data

HIPAA breaches ranked by people affected

Most common breaches by type

• Network server breaches affected the most people. 3,728,997 individuals had their data breached.
• Email breaches were the second most common breach, with 54,007 people affected.
• Paper/films breaches affected 7,504 people, the third most impactful breach type.

HIPAA breaches ranked by occurrence

Most common breach types

• Network server was the most common attack vector. There were 44 network server breaches.
• Email breaches were the second most common attack vector. There were 13  breaches.
• Paper/films and Electronic medical record breaches were the third most common attack vector, with 2 attacks each.

Year-over-year comparison

These charts compare the HIPAA data breach statistics from previous Paubox HIPAA Breach Reports (September 2021, September 2022, September 2023, and September 2024) with this month’s report.

HIPAA breaches ranked by people affected

What we observe

• Network server breaches affected the most people overall in August 2025.

• The number of people affected by network server breaches is almost three times less that of the previous August.

• The number of individuals impacted by Email breaches in August 2025 were down compared to previous years.

HIPAA breaches ranked by occurrence

What we observe

• Network server breaches were, yet again, the most frequent attack vector. 

• Email, as a the vector, was consistent with previous years' instances.

• All other attack vectors were steady and infrequent, year-over-year.

Takeaways

Network server breaches affected the most people in August 2025. DaVita Inc. had the most significant breach, which affected 2.6 million people. Vital Imaging Medical Diagnostic Centers had the second-largest breach, affecting nearly 260,000 people.

Overall, over 3.8 million individuals had their data accessed via 63 breaches reported in August 2025.

Full data

Click here to view the HHS’ raw data via Google Sheets.

About the Paubox HIPAA Breach Report

The Paubox HIPAA Breach Report analyzes recent PHI breaches that affected 500 or more individuals, as reported on the HHS Wall of Shame in August 2025.

SEE ALSO: HIPAA Compliant Email: The Definitive Guide

Robust inbound email security is a necessity for businesses today. Keeping your email security strategy updated helps ensure the protection of your network.