by Hannah Trum Senior Marketing Specialist
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HIPAA Breach Report for April 2021

by Hannah Trum Senior Marketing Specialist

The Paubox Breach Report analyzed HIPAA breach reporting submitted to the U.S. Department of Health & Human Services (HHS) in March 2021 to analyze the types of breaches of unsecured protected health information (PHI) affecting 500 or more people.

This report will cover:

HIPAA Breaches Ranked by People Affected

Top Three Breach Types

  • Network server breaches ranked first (as they have previously), with 2,346,170 people affected.
  • Email breaches ranked second with 520,059 people affected.
  • Other breach types ranked third with 17,919 people affected.

HIPAA Breaches Ranked by Occurrence

The Most Common

  • Network server breaches were the most common attack vector in March 2021, with 36 occurrences.
  • Email breaches were the second most common, with 11 breaches.
  • Paper/film breaches were the third most common, with 5 total breaches last month.


Data breaches via network servers continue to affect the most people and continue to be a top attack vector. Email breaches and attacks are a close second.

Health Net Community Solutions had the largest data breach in March 2021. 686,556 people were breached via a network server. Health Net of California had the second-largest breach. A network server attack affected 523,709 people.

Full Data

Click here to view the raw data via Google Sheets.

About the Paubox HIPAA Breach Report

The Paubox HIPAA Breach Report analyzes breaches that affected 500 or more individuals, as reported in the HHS Wall of Shame in March 2021.

SEE ALSO: HIPAA Compliant Email: the Definitive Guide