In 2021, around 45 percent of healthcare organizations reported that they had experienced a phishing attack in the previous twelve months, making it by far the most common cyber security incident reported. A further share of 17 percent experienced ransomware attacks, while seven percent saw data breaches or leakage.
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HIMSS. (January 28, 2022). Share of significant cyber security incidents experienced in healthcare organizations in the United States in 2021 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 29, 2026, from /statistics/1237131/cybersecurity-incidents-in-healthcare-organizations-us/
HIMSS. "Share of significant cyber security incidents experienced in healthcare organizations in the United States in 2021." Chart. January 28, 2022. ÌÇÐÄÆƽâ°æ. Accessed July 29, 2026. /statistics/1237131/cybersecurity-incidents-in-healthcare-organizations-us/
HIMSS. (2022). Share of significant cyber security incidents experienced in healthcare organizations in the United States in 2021. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 29, 2026. /statistics/1237131/cybersecurity-incidents-in-healthcare-organizations-us/
HIMSS. "Share of Significant Cyber Security Incidents Experienced in Healthcare Organizations in The United States in 2021." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 28 Jan 2022, /statistics/1237131/cybersecurity-incidents-in-healthcare-organizations-us/
HIMSS, Share of significant cyber security incidents experienced in healthcare organizations in the United States in 2021 ÌÇÐÄÆƽâ°æ, /statistics/1237131/cybersecurity-incidents-in-healthcare-organizations-us/ (last visited July 29, 2026)
Share of significant cyber security incidents experienced in healthcare organizations in the United States in 2021 [Graph], HIMSS, January 28, 2022. [Online]. Available: /statistics/1237131/cybersecurity-incidents-in-healthcare-organizations-us/
