7,681 healthcare data breaches
Under HIPAA, a hospital, clinic, insurer or one of their business partners has to report a breach of health information affecting 500 or more people to the U.S. Department of Health and Human Services (HHS), which publishes it. Smaller breaches are reported once a year. That makes this one of the most complete breach records there is: 968.6M records exposed so far, updated daily.
Health breaches tend to leak more than an email address: names, dates of birth, Social Security numbers, insurance IDs and medical details. If you were in one, watch your insurance statements for care you didn't get, and consider a credit freeze.
The 500 biggest
| Breach | Date | Affected | Source |
|---|---|---|---|
 Change Healthcare | Feb 2024 | 192.7M WA residents | View breach |
 Anthem | Feb 2015 | 78.8M WA residents | 2 sources ▾ |
| Welltok | May 2023 | 14.8M WA residents | 2 sources ▾ |
| Kaiser Foundation Health Plan | May 2023 | 13.4M WA residents | 3 sources ▾ |
| Optum360 | Jul 2019 | 11.5M WA residents | HHS |
| HCA Healthcare | Jun 2023 | 11.3M WA residents | View breach |
| Premera Blue Cross | Mar 2015 | 11M WA residents | HHS |
| Laboratory | Aug 2018 | 10.3M WA residents | 3 sources ▾ |
| Excellus Health Plan | Sept 2015 | 9.4M WA residents | HHS |
| Perry Johnson & Associates | Mar 2023 | 9.3M WA residents | 3 sources ▾ |
| Managed Care of North America | Feb 2023 | 8.6M WA residents | 3 sources ▾ |
| Delta Dental of California | May 2023 | 7.1M WA residents | 3 sources ▾ |
| Episource | Jan 2025 | 6.7M WA residents | 3 sources ▾ |
| Community Health Systems Professional Services Corporations | Aug 2014 | 6.1M WA residents | HHS |
 Lumexa Imaging | Mar 2026 | 5.8M WA residents | View breach |
 PharMerica Corporation | Mar 2023 | 5.8M WA residents | View breach |
 Yale New Haven Health System | Mar 2025 | 5.6M WA residents | View breach |
| Ascension Health | Feb 2024 | 5.5M WA residents | 3 sources ▾ |
| Science Applications International | Nov 2011 | 4.9M WA residents | HHS |
 HealthEC LLC | Jul 2023 | 4.8M WA residents | View breach |
| Blue Shield of California | Apr 2021 | 4.7M WA residents | View breach |
| University of California, Los Angeles Health | Jul 2015 | 4.5M WA residents | HHS |
| Community Health Systems Professional Services | Apr 2014 | 4.5M WA residents | 2 sources ▾ |
| HealthEquity | Mar 2024 | 4.3M WA residents | 3 sources ▾ |
| Independent Living Systems | Sept 2022 | 4.2M WA residents | HHS |
| Reventics | Dec 2022 | 4.2M WA residents | 3 sources ▾ |
| 20/20 Eye Care Network | Jan 2021 | 4.1M WA residents | 3 sources ▾ |
| AdaptHealth | Jun 2026 | 4.1M WA residents | 3 sources ▾ |
| Colorado Department of Health Care Policy & Financing | May 2023 | 4.1M WA residents | 2 sources ▾ |
| Advocate Health and Hospitals | Aug 2013 | 4M WA residents | HHS |
| Concentra Health Services | Jan 2024 | 4M WA residents | HHS |
 Medtronic | Apr 2026 | 3.8M WA residents | View breach |
| Unlimited Technology Systems | Oct 2025 | 3.8M WA residents | 3 sources ▾ |
 CareCloud | Mar 2026 | 3.8M WA residents | View breach |
| Banner Health | Jun 2016 | 3.6M WA residents | 3 sources ▾ |
| Florida Healthy Kids | Jan 2021 | 3.5M WA residents | HHS |
| Medical Informatics Engineering | Jul 2015 | 3.5M WA residents | HHS |
| Newkirk Products | May 2016 | 3.5M WA residents | 2 sources ▾ |
 TriZetto Provider Solutions | Nov 2024 | 3.4M WA residents | View breach |
| Regal Medical Group,Lakeside Medical Organization, ADOC Acquisition, & Greater Covina Medical | Feb 2023 | 3.4M WA residents | HHS |
| Trinity Health | May 2020 | 3.3M WA residents | 2 sources ▾ |
| Regal Medical Group | Dec 2022 | 3.3M WA residents | View breach |
| CareSource | May 2023 | 3.2M WA residents | 3 sources ▾ |
| Cerebral | Oct 2019 | 3.2M WA residents | 3 sources ▾ |
| Centers for Medicare & Medicaid Services | Sept 2024 | 3.1M WA residents | HHS |
| NationsBenefits | Apr 2023 | 3.1M WA residents | 2 sources ▾ |
| Advocate Aurora Health | Oct 2022 | 3M WA residents | HHS |
| Dominion Dental Services | Aug 2010 | 3M WA residents | 3 sources ▾ |
 QualDerm Partners | Dec 2025 | 3M WA residents | View breach |
| PIH Health | Jan 2025 | 2.9M WA residents | HHS |
 PIH Health | Nov 2024 | 2.9M WA residents | View breach |
| Lincare | Sept 2021 | 2.9M WA residents | 2 sources ▾ |
| Acadian Ambulance Service | Jun 2024 | 2.9M WA residents | 2 sources ▾ |
| Connexin Software | Jul 2022 | 2.8M WA residents | 2 sources ▾ |
| Navvis | Jul 2023 | 2.8M WA residents | 3 sources ▾ |
| A&A Services | Oct 2023 | 2.8M WA residents | 3 sources ▾ |
| Baylor Genetics | Jun 2026 | 2.8M WA residents | 3 sources ▾ |
 ESO Solutions | Sept 2023 | 2.7M WA residents | View breach |
 DaVita | Mar 2025 | 2.7M WA residents | View breach |
 Veradigm | Dec 2024 | 2.7M WA residents | View breach |
| Harvard Pilgrim Health Care | Mar 2023 | 2.7M WA residents | 3 sources ▾ |
| AccuDoc Solutions | Nov 2018 | 2.7M WA residents | HHS |
| NEC Networks | Feb 2021 | 2.6M WA residents | 3 sources ▾ |
| Smile Brands | Apr 2021 | 2.6M WA residents | 3 sources ▾ |
| WebTPA Employer Services | Apr 2023 | 2.5M WA residents | View breach |
| Nacogdoches Memorial Hospital | Mar 2026 | 2.5M WA residents | HHS |
| Norton Healthcare | May 2023 | 2.5M WA residents | View breach |
| Enzo Clinical Labs | Jun 2023 | 2.5M WA residents | HHS |
| Florida Health Sciences Center | Jul 2023 | 2.4M WA residents | HHS |
| Forefront Dermatology, S.C | Jul 2021 | 2.4M WA residents | HHS |
 INTEGRIS Health | Nov 2023 | 2.4M WA residents | View breach |
| Shields Health Care | Mar 2022 | 2.4M WA residents | 3 sources ▾ |
 Postmeds | Aug 2023 | 2.4M WA residents | View breach |
| Centers for Medicare & Medicaid Services | Apr 2023 | 2.3M WA residents | HHS |
| Medical Management Resource | Nov 2023 | 2.3M WA residents | 3 sources ▾ |
| 21st Century Oncology | Oct 2015 | 2.2M WA residents | 3 sources ▾ |
| McLaren Health Care | Jul 2023 | 2.1M WA residents | 2 sources ▾ |
| Berry, Dunn, McNeil & Parker | Nov 2023 | 2.1M WA residents | HHS |
| Xerox State Healthcare | Sept 2014 | 2M WA residents | HHS |
 Arietis Health | May 2023 | 2M WA residents | View breach |
| Great Expressions Dental Centers | Feb 2023 | 1.9M WA residents | 3 sources ▾ |
 Anne Arundel Dermatology | Feb 2025 | 1.9M WA residents | View breach |
| IBM | Apr 2011 | 1.9M WA residents | HHS |
| Apria Healthcare | May 2022 | 1.9M WA residents | HHS |
| Fred Hutchinson Cancer Center | Nov 2023 | 1.8M WA residents | 3 sources ▾ |
| Summit Pathology and Summit Pathology Laboratories | Oct 2024 | 1.8M WA residents | HHS |
| New York City Health and Hospitals | Mar 2026 | 1.8M WA residents | HHS |
| Performance Health Technology | Aug 2023 | 1.8M WA residents | HHS |
| NASCO | May 2023 | 1.7M WA residents | 3 sources ▾ |
| OnePoint Patient Care | Aug 2024 | 1.7M WA residents | 3 sources ▾ |
| Clinical Pathology Laboratories | Aug 2018 | 1.7M WA residents | 3 sources ▾ |
| Dental Care Alliance | Dec 2020 | 1.7M WA residents | HHS |
| GRM Information Management Services | Feb 2011 | 1.7M WA residents | HHS |
| Kettering Adventist Healthcare | Jul 2025 | 1.7M WA residents | HHS |
| Baptist Medical Center | Mar 2022 | 1.6M WA residents | 3 sources ▾ |
| Inmediata Health | May 2019 | 1.6M WA residents | HHS |
| Eskenazi Health | Oct 2021 | 1.5M WA residents | HHS |
| Community Health Network | Nov 2022 | 1.5M WA residents | HHS |
| Keenan & Associates | Aug 2023 | 1.5M WA residents | 2 sources ▾ |
| EyeMed Vision Care | Jun 2020 | 1.5M WA residents | 3 sources ▾ |
| Lubbock County Hospital District | Nov 2024 | 1.5M WA residents | HHS |
| MEDNAX Services | Jun 2020 | 1.4M WA residents | 3 sources ▾ |
| Iowa Health System | Apr 2018 | 1.4M WA residents | HHS |
| Radiology Associates of Richmond | Apr 2024 | 1.4M WA residents | 3 sources ▾ |
| St. Joseph's/Candler Health System | Aug 2021 | 1.4M WA residents | HHS |
 Xsolis | Jan 2026 | 1.4M WA residents | View breach |
| Novant Health | Aug 2022 | 1.4M WA residents | HHS |
| DermCare Management | May 2025 | 1.4M WA residents | HHS |
| North Broward Hospital District | Oct 2021 | 1.4M WA residents | 3 sources ▾ |
| ALN Medical Management | May 2024 | 1.3M WA residents | HHS |
| US Radiology Specialists | Feb 2022 | 1.3M WA residents | HHS |
| Prospect Medical | Jul 2023 | 1.3M WA residents | 2 sources ▾ |
| University Medical Center of Southern Nevada | Jun 2021 | 1.3M WA residents | 3 sources ▾ |
| CareFirst BlueCross Blueshield | Jun 2014 | 1.3M WA residents | 2 sources ▾ |
| Texas Tech University Health Sciences Center | Jun 2022 | 1.3M WA residents | HHS |
 Geisinger | Nov 2023 | 1.3M WA residents | View breach |
| SimonMed Imaging | Jan 2025 | 1.3M WA residents | View breach |
| American Anesthesiology | Jun 2020 | 1.3M WA residents | 2 sources ▾ |
| Scripps Health | Apr 2021 | 1.3M WA residents | 2 sources ▾ |
| MCBS | Sept 2025 | 1.3M WA residents | View breach |
| Cook County Health and Hospitals System | Sept 2023 | 1.2M WA residents | HHS |
| Employees Retirement System of Texas | Oct 2018 | 1.2M WA residents | HHS |
| INTEGRIS Health | Dec 2019 | 1.2M WA residents | HHS |
| Virginia Department of Medical Assistance Services | Aug 2023 | 1.2M WA residents | HHS |
| UNM Health | Aug 2021 | 1.2M WA residents | HHS |
| Nuance Communications | May 2023 | 1.2M WA residents | 3 sources ▾ |
| Absolute Dental | Feb 2025 | 1.2M WA residents | 3 sources ▾ |
| AvMed | Jun 2010 | 1.2M WA residents | HHS |
| Professional Business Systems | Dec 2020 | 1.2M WA residents | 2 sources ▾ |
| Community Health Systems Professional Services Corporations | Mar 2023 | 1.2M WA residents | HHS |
| Baesman | Aug 2023 | 1.2M WA residents | HHS |
| Palomar Health Medical | Jul 2024 | 1.1M WA residents | HHS |
| Presbyterian Healthcare Services | May 2019 | 1.1M WA residents | 2 sources ▾ |
| JDC Healthcare Management | Oct 2021 | 1.1M WA residents | HHS |
| Montana Department of Public Health & Human Services | Jul 2014 | 1.1M WA residents | HHS |
| Community Health Center | Oct 2024 | 1.1M WA residents | 2 sources ▾ |
| The Nemours Foundation | Oct 2011 | 1.1M WA residents | HHS |
| NextGen Healthcare | Mar 2023 | 1M WA residents | View breach |
| Inova Health System | Feb 2020 | 1M WA residents | 3 sources ▾ |
| Superior Air-Ground Ambulance Service | May 2024 | 1M WA residents | HHS |
| Wolverine Solutions | Sept 2018 | 1M WA residents | 2 sources ▾ |
| BlueCross BlueShield of Tennessee | Nov 2010 | 1M WA residents | HHS |
| Magellan Health | Apr 2020 | 1M WA residents | 3 sources ▾ |
| ZOLL Services | Mar 2023 | 997.1K WA residents | HHS |
| UW Medicine | Feb 2019 | 973K WA residents | HHS |
| Paradigm Healthcare Services | Oct 2025 | 970.4K WA residents | 2 sources ▾ |
| Sutter Medical Foundation | Nov 2011 | 943.4K WA residents | HHS |
| Practice Resources | Apr 2022 | 942.1K WA residents | 2 sources ▾ |
| Frederick Health | Mar 2025 | 934.3K WA residents | HHS |
| Transformative Healthcare | Feb 2023 | 911.8K WA residents | 3 sources ▾ |
| ATSG | Oct 2024 | 909.5K WA residents | HHS |
| Essen Medical Associates | May 2023 | 904.7K WA residents | HHS |
| City of Hope | Dec 2023 | 902.5K WA residents | HHS |
| Singing River Health System and its wholly owned subsidiary, Singing River Gulfport | Oct 2023 | 895.2K WA residents | HHS |
| Eastern Radiologists | Feb 2024 | 886.7K WA residents | HHS |
| Hospital Sisters Health System | Aug 2023 | 882.8K WA residents | View breach |
| Valley Anesthesiology Consultants | Mar 2016 | 882.6K WA residents | 3 sources ▾ |
| US Fertility | Nov 2020 | 878.6K WA residents | HHS |
| Wright & Filippis | Jan 2022 | 877.6K WA residents | 2 sources ▾ |
| Partnership HealthPlan of California | Mar 2022 | 852.4K WA residents | 3 sources ▾ |
 Sutter Health | May 2023 | 845.4K WA residents | View breach |
| CHRISTUS Spohn Health System | Jul 2022 | 842.9K WA residents | HHS |
| Horizon Healthcare Services | Jan 2014 | 839.7K WA residents | HHS |
 City of Hope | Sept 2023 | 827.1K WA residents | View breach |
| Luminis Health Anne Arundel Medical Center | Nov 2021 | 824.5K WA residents | HHS |
| Texas Tech University Health Sciences Center El Paso | Nov 2024 | 815K WA residents | HHS |
| Iron Mountain Data Products | Jul 2010 | 800K WA residents | HHS |
 MCG Health | Feb 2020 | 793.3K WA residents | View breach |
| Utah Department of Technology Services | Apr 2012 | 780K WA residents | HHS |
| Ann & Robert H. Lurie Children’s Hospital Of Chicago | Jan 2024 | 775.9K WA residents | 2 sources ▾ |
| MNGI Digestive Health, PA | Oct 2023 | 767.7K WA residents | HHS |
| Doctors' Center Hospital | Nov 2022 | 762.4K WA residents | HHS |
| Personal Touch | Mar 2021 | 753.1K WA residents | HHS |
| Oregon Anesthesiology | Dec 2021 | 750.5K WA residents | HHS |
| County of Los Angeles Departments of Health and Mental Health | Dec 2016 | 749K WA residents | HHS |
| Upstream RollCo | Jan 2023 | 748.7K WA residents | 3 sources ▾ |
 McLaren Health Care | Jul 2024 | 743.1K WA residents | View breach |
| Missouri Department of Social Services | Aug 2023 | 739.9K WA residents | HHS |
| Yuma Regional Medical Center | Jun 2022 | 738.1K WA residents | HHS |
| Florida Department of Health | Aug 2024 | 729.7K WA residents | HHS |
| AHMC Healthcare | Oct 2013 | 729K WA residents | 2 sources ▾ |
| OpenLoop Health | Jan 2026 | 716K WA residents | View breach |
| Illinois Department of Human Services | Jan 2026 | 705K WA residents | HHS |
 Medusind | Dec 2023 | 701.5K WA residents | View breach |
| UF Health Central Florida | Jul 2021 | 700.9K WA residents | HHS |
| Commonwealth Health | Mar 2017 | 697.8K WA residents | HHS |
| Virginia Department of Medical Assistance Services | Mar 2015 | 697.6K WA residents | HHS |
| Allegheny County | Jul 2023 | 689.7K WA residents | HHS |
| United Seating and Mobility | Feb 2024 | 688.9K WA residents | 3 sources ▾ |
| Health Net Community Solutions | Jan 2021 | 688.6K WA residents | 2 sources ▾ |
| Sea Mar Community Health Centers | Dec 2020 | 688K WA residents | 3 sources ▾ |
| PracticeMax | Apr 2021 | 685.6K WA residents | 2 sources ▾ |
| Richmond University Medical Center | Dec 2024 | 674K WA residents | HHS |
| Illinois Bone & Joint Institute | May 2024 | 665.3K WA residents | 2 sources ▾ |
| OrthopedicsNY | Feb 2024 | 656.1K WA residents | HHS |
| DuPage Medical | Jul 2021 | 655.4K WA residents | 2 sources ▾ |
| Health Share of Oregon | Feb 2020 | 654.4K WA residents | HHS |
| Bon Secours Health System | Apr 2016 | 652K WA residents | 2 sources ▾ |
| Florida Orthopaedic Institute | Apr 2020 | 651.5K WA residents | 2 sources ▾ |
| Texas Tech University Health Sciences Center | Nov 2024 | 650K WA residents | HHS |
| Hendrick Health | Jan 2021 | 640.4K WA residents | HHS |
| California Physicians’ Service | Nov 2023 | 636.8K WA residents | HHS |
| CommonSpirit Health | Sept 2022 | 633K WA residents | 2 sources ▾ |
| International Business Machines | Sept 2023 | 630.8K WA residents | 2 sources ▾ |
| ApolloMD Business Services | Feb 2026 | 626.5K WA residents | HHS |
| Oregon Department of Human Services | Mar 2019 | 625K WA residents | HHS |
| Risas Dental & Braces | Jun 2023 | 618.2K WA residents | 2 sources ▾ |
| CentraState Healthcare System | Feb 2023 | 617.9K WA residents | HHS |
| Radiology Associates of Albuquerque, PA | Sept 2021 | 616.2K WA residents | HHS |
| Metropolitan Area EMS Authority | Dec 2022 | 612K WA residents | HHS |
| Emergency Medical Services Authority | Mar 2024 | 611.7K WA residents | HHS |
| East River Medical Imaging | Nov 2023 | 605.8K WA residents | HHS |
| Community Medical Centers | Oct 2021 | 604.6K WA residents | 2 sources ▾ |
| The Harris Center for Mental Health and IDD | Aug 2023 | 599.4K WA residents | HHS |
| Spectrum Vision Partners | Feb 2024 | 592.2K WA residents | HHS |
| Blue | Feb 2025 | 591.7K WA residents | HHS |
| Trinity Health | Jan 2021 | 586.9K WA residents | 2 sources ▾ |
 Atrium Health | Jan 2015 | 586K WA residents | View breach |
| Comstar | Mar 2022 | 585.6K WA residents | 2 sources ▾ |
| Consulting Radiologists | Feb 2024 | 583.8K WA residents | 2 sources ▾ |
| Washington Gastroenterology | Oct 2024 | 583.5K WA residents | 3 sources ▾ |
| CA Department of Developmental Services | Apr 2018 | 582.2K WA residents | HHS |
| Utah Imaging Associates | Aug 2021 | 582.2K WA residents | 3 sources ▾ |
| Erie Family Health Centers | Mar 2026 | 570K WA residents | HHS |
| Plaza Radiology | Dec 2023 | 569K WA residents | HHS |
| NorthBay Healthcare | Apr 2024 | 569K WA residents | HHS |
| MSK | May 2018 | 566.2K WA residents | 2 sources ▾ |
| CNO ACE | Oct 2018 | 566.2K WA residents | HHS |
| Unum Group SACE | Aug 2023 | 559.3K WA residents | HHS |
| Murfreesboro Medical Clinic & SurgiCenter | Jun 2023 | 559K WA residents | HHS |
| Georgia Department of Community Health | Mar 2015 | 557.8K WA residents | HHS |
| Health Net of California | Jan 2021 | 550.8K WA residents | 2 sources ▾ |
| Elkhart Emergency Physicians | May 2020 | 550K WA residents | HHS |
| The Chattanooga Heart Institute | Jul 2023 | 545.5K WA residents | HHS |
| The Harris Center for Mental Health and IDD | Jan 2024 | 545K WA residents | HHS |
| Electrostim Medical Services | Dec 2023 | 543K WA residents | HHS |
| Centers Lab NJ | Jun 2026 | 542.4K WA residents | HHS |
| LifeBridge Health | Sept 2016 | 538.1K WA residents | 2 sources ▾ |
| SysInformation Healthcare Services | Aug 2023 | 538K WA residents | HHS |
| Texas ENT Specialists | Dec 2021 | 535.5K WA residents | HHS |
| Group Health Cooperative of South Central Wisconsin | Apr 2024 | 533.8K WA residents | HHS |
| Peachtree Orthopaedic Clinic | Nov 2016 | 531K WA residents | HHS |
| Wolfe Clinic | Dec 2021 | 530.3K WA residents | 2 sources ▾ |
| United Seating and Mobility | Sept 2024 | 529K WA residents | 3 sources ▾ |
| Women's Care Florida | Sept 2019 | 527.3K WA residents | HHS |
| TAG Urgent Care Support Services | Aug 2023 | 517K WA residents | HHS |
| EISENHOWER MEDICAL CENTER | Mar 2011 | 514.3K WA residents | HHS |
| Adaptive Health Integrations | Apr 2022 | 510.6K WA residents | HHS |
| Capital Health System | Jan 2024 | 503.1K WA residents | HHS |
| Christie Business | Jul 2021 | 502.9K WA residents | 2 sources ▾ |
| North Kansas City Hospital | Jan 2024 | 502.4K WA residents | HHS |
| Health Management Concepts | Aug 2018 | 502.4K WA residents | HHS |
| CorrectCare Integrated Health | Jan 2022 | 502.1K WA residents | 2 sources ▾ |
| OakBend Medical Center | Oct 2022 | 500K WA residents | HHS |
| State of Alaska Department of Health & Social Services | Sept 2021 | 500K WA residents | HHS |
| Airway Oxygen | Jun 2017 | 500K WA residents | HHS |
| Wolfe Clinic | Feb 2021 | 499.8K WA residents | 2 sources ▾ |
| Bayhealth Medical Center | Oct 2024 | 497K WA residents | HHS |
| UC San Diego Health | Dec 2020 | 495.9K WA residents | 2 sources ▾ |
| WakeMed Health and Hospitals | Oct 2022 | 495.8K WA residents | HHS |
| Monongalia Health System | Dec 2021 | 492.9K WA residents | 2 sources ▾ |
| Intellihartx | Jun 2023 | 489.8K WA residents | HHS |
| Cornerstone Healthcare Group Management Services | Dec 2023 | 485K WA residents | 2 sources ▾ |
| Aetna ACE | Jul 2020 | 484.2K WA residents | HHS |
 Cardiovascular Consultants Ltd. | Sept 2023 | 484K WA residents | View breach |
 Serviceaide | Sept 2024 | 483.1K WA residents | View breach |
| Radiology Regional Center, PA | Feb 2016 | 483.1K WA residents | HHS |
| Illinois Department of Healthcare and Family Services, Illinois Department of Human Services | Oct 2022 | 480.4K WA residents | HHS |
| Puerto Rico Department of Health | Nov 2010 | 475K WA residents | HHS |
| Brightline | Jan 2023 | 473.5K WA residents | 3 sources ▾ |
| AU Medical Center | Aug 2018 | 472.4K WA residents | HHS |
| Omni Family Health | Aug 2024 | 468.3K WA residents | 2 sources ▾ |
| CareCentrix | Jul 2019 | 467.6K WA residents | HHS |
| Summit Medical | Jan 2024 | 464.2K WA residents | HHS |
| Kootenai Health | Feb 2024 | 464.1K WA residents | 3 sources ▾ |
| Maternal and Family Health Services | Aug 2022 | 461.1K WA residents | HHS |
| Philips Respironics | May 2023 | 457.2K WA residents | 2 sources ▾ |
 Goshen Medical Center | Feb 2025 | 456.4K WA residents | View breach |
| Sound Generations | Jul 2021 | 456.2K WA residents | 2 sources ▾ |
| Retina Group of Washington | Dec 2023 | 455.9K WA residents | HHS |
| Harris County Hospital District | Jul 2023 | 455.7K WA residents | HHS |
| SouthCoast Medical | Aug 2023 | 450.9K WA residents | HHS |
| Orlando Family Physicians | Jul 2021 | 447.4K WA residents | HHS |
| Benefit Recovery Specialists | Jun 2020 | 447.4K WA residents | HHS |
| Center for Vein Restoration | Dec 2024 | 446.1K WA residents | HHS |
| Mountain View Hospital | Jul 2023 | 441.9K WA residents | HHS |
| Intramural Practice Plan | Sept 2019 | 439.8K WA residents | HHS |
| Proliance Surgeons | Feb 2023 | 437.4K WA residents | View breach |
| Ascension Health | Dec 2024 | 437.3K WA residents | View breach |
| CBIZ KA Consulting Services | Nov 2023 | 436.2K WA residents | HHS |
| Georgia Department of Human Services | Nov 2018 | 435.3K WA residents | HHS |
| Cardiovascular Associates | Nov 2022 | 433.3K WA residents | 2 sources ▾ |
| Temple University Health System | Sept 2023 | 431.6K WA residents | HHS |
| QRS | Oct 2021 | 430.3K WA residents | HHS |
| Salud Family Health | Sept 2022 | 427.5K WA residents | 2 sources ▾ |
| Rebound Orthopedics & Neurosurgery | Feb 2024 | 426.5K WA residents | 2 sources ▾ |
| BioReference Laboratories | Jul 2019 | 425.7K WA residents | HHS |
| East Tennessee Children's Hospital | Apr 2022 | 422.5K WA residents | HHS |
| Bayamon Medical Center | Jul 2019 | 422.5K WA residents | HHS |
| Bricker & Eckler | Jan 2021 | 420.5K WA residents | 2 sources ▾ |
| Health Plan of San Joaquin | Dec 2020 | 418.8K WA residents | HHS |
| Memphis Pathology Laboratory | Jul 2019 | 417.1K WA residents | HHS |
| USV Optical | Sept 2021 | 412.6K WA residents | HHS |
| Specialty Networks | Aug 2024 | 411K WA residents | HHS |
| American Addiction Centers | Sept 2024 | 410.7K WA residents | 3 sources ▾ |
| Philadelphia | Sept 2025 | 410.5K WA residents | HHS |
| Med Atlantic | Nov 2025 | 410.3K WA residents | HHS |
| Planned Parenthood Los Angeles | Oct 2021 | 409.8K WA residents | 2 sources ▾ |
| St. Joseph Health System | Dec 2013 | 405K WA residents | 2 sources ▾ |
| Navicent Health | Mar 2019 | 405K WA residents | HHS |
| Sunrise Medical Laboratories | Aug 2018 | 401.9K WA residents | 2 sources ▾ |
| El Centro Del Barrio | May 2024 | 400K WA residents | HHS |
| Columbia Surgical Specialist of Spokane | Feb 2019 | 400K WA residents | HHS |
| California Correctional Health Care Services | Feb 2016 | 400K WA residents | 2 sources ▾ |
| Spartanburg Regional Healthcare System | May 2011 | 400K WA residents | HHS |
| District of Columbia, Department of Health Care Finance | Sept 2026 | 399.1K WA residents | HHS |
| Monongalia Health System | Dec 2021 | 398.2K WA residents | HHS |
| Triple-S Salud | Jan 2014 | 398K WA residents | HHS |
| Triple-S Salud | Nov 2010 | 398K WA residents | HHS |
| Quantum Imaging and Therapeutics Associates | Nov 2021 | 394.5K WA residents | HHS |
| Gryphon Healthcare | Jul 2024 | 393.4K WA residents | View breach |
| Onix | May 2023 | 387.8K WA residents | HHS |
| Community Health Plan of Washington | Jan 2016 | 381.5K WA residents | 2 sources ▾ |
| Panorama Eyecare | Jun 2024 | 377.9K WA residents | HHS |
| Orthopedics Rhode Island | Sept 2024 | 377.7K WA residents | 2 sources ▾ |
| Continuum Health Alliance | Apr 2024 | 377.1K WA residents | HHS |
| Arisa Health | Jul 2024 | 375.4K WA residents | HHS |
| Affiliated Dermatologists and Dermatologic Surgeons, P.A | May 2024 | 373.7K WA residents | HHS |
| Health Quest Systems | May 2019 | 372K WA residents | HHS |
| Rocky Mountain Gastroenterology Associates | Nov 2024 | 366.5K WA residents | HHS |
| Sarrell Dental | Sept 2019 | 363.6K WA residents | HHS |
| Goodman Campbell Brain and Spine | Jul 2022 | 362.8K WA residents | HHS |
| Northwest Radiologists, Inc./Mount Baker Imaging | Jan 2025 | 362.7K WA residents | 2 sources ▾ |
| Saint Anthony Health Ministries | Jan 2024 | 360.2K WA residents | HHS |
| Saint Luke's Foundation | Feb 2020 | 360.2K WA residents | 2 sources ▾ |
| Onsite Mammography | Apr 2025 | 357.3K WA residents | HHS |
| Networking Technology | Mar 2026 | 353.8K WA residents | 3 sources ▾ |
| Einstein Healthcare Network | Oct 2020 | 353.6K WA residents | HHS |
| Western Washington Medical | Jul 2023 | 350.9K WA residents | 3 sources ▾ |
| El Centro Del Barrio | Aug 2023 | 350K WA residents | HHS |
| BioPlus Specialty Pharmacy Services | Oct 2021 | 348.9K WA residents | 3 sources ▾ |
| NorthShore University HealthSystem | Sept 2020 | 348.7K WA residents | HHS |
| Azura Vascular Care | Jan 2024 | 348K WA residents | HHS |
| ARcare | Apr 2022 | 345.4K WA residents | HHS |
| Affinity Health Plan | Apr 2010 | 344.6K WA residents | HHS |
| Conifer Revenue Cycle Solutions | Aug 2022 | 343.6K WA residents | HHS |
| SCL Health – Colorado | Sept 2020 | 343.5K WA residents | HHS |
| Sutherland Healthcare Solutions | Feb 2014 | 342.2K WA residents | 2 sources ▾ |
| St Clair Orthopaedics & Sports Medicine | Jan 2025 | 340K WA residents | HHS |
| Molecular Pathology Laboratory Network | Mar 2022 | 339.5K WA residents | HHS |
| Health Center Partners of Southern California | Oct 2020 | 337.2K WA residents | 2 sources ▾ |
| New Era Life Insurance Companies | Feb 2025 | 335.5K WA residents | HHS |
| Orthopedic Associates of Dutchess County | May 2021 | 330.1K WA residents | HHS |
| Asheville Eye Associates | Jan 2025 | 327.8K WA residents | HHS |
| American Addiction Centers | May 2026 | 327.8K WA residents | View breach |
| UConn Health | Aug 2018 | 326.6K WA residents | 2 sources ▾ |
| Denton County, Texas | Aug 2021 | 326.4K WA residents | HHS |
| San Juan Regional Medical Center | Jun 2021 | 325.7K WA residents | HHS |
| Aetna ACE | Feb 2022 | 325.3K WA residents | HHS |
| Ciox Health | Oct 2024 | 320.7K WA residents | HHS |
| Premier Family Medical | Sept 2019 | 320K WA residents | HHS |
| Advanced Medical Management | Jun 2023 | 319.5K WA residents | HHS |
| VITAS Hospice Services | Sept 2025 | 319.2K WA residents | 2 sources ▾ |
| Compumedics USA | Jun 2025 | 318.2K WA residents | HHS |
| Super Care | Jul 2021 | 317.9K WA residents | 2 sources ▾ |
| Otolaryngology Associates | Apr 2024 | 316.8K WA residents | HHS |
| CompleteCare Health Network | Dec 2023 | 316.1K WA residents | HHS |
| AdventHealth | Oct 2020 | 315.3K WA residents | HHS |
| Emory Healthcare | Feb 2012 | 315K WA residents | 2 sources ▾ |
| Nuvance Health | Sept 2020 | 314.8K WA residents | HHS |
| Magellan Rx Management | Jun 2020 | 314.7K WA residents | HHS |
| Texas Retina Associates | Jun 2024 | 312.9K WA residents | HHS |
| Cytometry Specialists | Mar 2022 | 312K WA residents | HHS |
| Lifespan Physician Group of Massachusetts | Jul 2026 | 311.8K WA residents | HHS |
| University of Minnesota Physicians | Jan 2020 | 310.7K WA residents | 2 sources ▾ |
| Johns Hopkins Medicine | Jul 2023 | 310.4K WA residents | HHS |
| Anna Jaques Hospital a member of Beth Israel Health | Feb 2024 | 308.8K WA residents | HHS |
| The Baton Rouge Clinic | Sept 2020 | 308.2K WA residents | HHS |
| Des Moines Orthopaedic Surgeons | Jan 2024 | 307.9K WA residents | HHS |
| Touchstone Medical Imaging | May 2014 | 307.5K WA residents | 2 sources ▾ |
| Beacon Health System | Nov 2013 | 306.8K WA residents | 2 sources ▾ |
| Metro Santurce | Apr 2019 | 305.7K WA residents | HHS |
| Thompson Coburn | Nov 2024 | 305.1K WA residents | HHS |
| Empress Ambulance Service | Sept 2022 | 305.1K WA residents | HHS |
| Northern Light Health | May 2020 | 304.4K WA residents | 2 sources ▾ |
| Talbert House | Sept 2021 | 304K WA residents | HHS |
| Minnesota Department of Human Services | Jan 2026 | 304K WA residents | HHS |
| SSM Health St. Mary's Hospital | Jul 2018 | 301K WA residents | HHS |
| AMERICAN CLINICAL SOLUTIONS | Jul 2024 | 300K WA residents | HHS |
| Women's Health Care Group of PA | Jul 2017 | 300K WA residents | HHS |
| Central Ohio Urology | Sept 2016 | 300K WA residents | HHS |
| Allegheny Health Network | Dec 2020 | 299.5K WA residents | HHS |
| North Los Angeles County Regional Center | Nov 2024 | 298.6K WA residents | 2 sources ▾ |
| Northeast Radiology | Mar 2020 | 298.5K WA residents | HHS |
| Synergy Healthcare Services | Jul 2023 | 297K WA residents | HHS |
| AspenPointe | Nov 2020 | 295.6K WA residents | HHS |
| Allegheny Health Network Home Medical Equipment | Jan 2025 | 292.8K WA residents | HHS |
| BJC Health System | May 2020 | 287.9K WA residents | HHS |
| South Denver Cardiology Associates | Mar 2022 | 287.7K WA residents | HHS |
| Excelsior Orthopaedics | Aug 2024 | 286.9K WA residents | HHS |
| North Texas Behavioral Health Authority | Mar 2026 | 285.1K WA residents | HHS |
| Oak Valley Hospital District | Apr 2023 | 284.6K WA residents | 2 sources ▾ |
| M&D Capital Premier Billing | Jun 2023 | 284.3K WA residents | 2 sources ▾ |
| Premier Medical Group of the Hudson Valley | Aug 2026 | 282.1K WA residents | HHS |
| Alabama Cardiovascular | Aug 2024 | 280.5K WA residents | HHS |
| Watson Clinic | Jan 2024 | 280.3K WA residents | View breach |
| Oklahoma State University | Jan 2018 | 279.9K WA residents | HHS |
| Urology Austin | Jan 2017 | 279.7K WA residents | 2 sources ▾ |
| Zumpano Patricios, P.A | Jul 2025 | 279.3K WA residents | HHS |
| Greater Rochester Independent Practice Association | Oct 2023 | 279.2K WA residents | HHS |
| ZOLL Services | Nov 2018 | 277.3K WA residents | 2 sources ▾ |
| Shred-it International | Jul 2013 | 277K WA residents | HHS |
| Santa Clara Family Health Plan | Jan 2023 | 277K WA residents | 2 sources ▾ |
| Florida Physician Specialists | Apr 2026 | 276.5K WA residents | HHS |
| Med Associates | Jun 2018 | 276.1K WA residents | HHS |
| Avem Health Partners | Dec 2022 | 271.3K WA residents | HHS |
| The Stern Cardiovascular Foundation | Nov 2022 | 270.6K WA residents | HHS |
| Deanco Healthcare | May 2023 | 269.8K WA residents | 2 sources ▾ |
| Southwest Louisiana Health Care System | Dec 2022 | 269.8K WA residents | HHS |
 Radiology Associates of Richmond | Jul 2025 | 266.2K WA residents | View breach |
| Stokes Regional Eye Centers | Jun 2022 | 266.2K WA residents | HHS |
| Pacific Alliance Medical Center | Jun 2017 | 266.1K WA residents | 2 sources ▾ |
| BayMark Health Services | Sept 2024 | 265.7K WA residents | 3 sources ▾ |
| Liberty Hospital | Feb 2024 | 264.5K WA residents | HHS |
| Health Alliance Hospital Mary's Avenue Campus | Dec 2023 | 264.2K WA residents | HHS |
| Union Health System | Apr 2025 | 262.8K WA residents | HHS |
| AMITA Health | Dec 2020 | 261.1K WA residents | HHS |
| Refuah Health Center | Apr 2022 | 260.7K WA residents | HHS |
| Ridgeway Pharmacy | Jun 2026 | 258.9K WA residents | 2 sources ▾ |
| Synergic Healthcare Solutions | Jul 2022 | 258.4K WA residents | HHS |
| South Florida Behavioral Health Network | Sept 2023 | 258.1K WA residents | HHS |
| Adams County | Dec 2018 | 258.1K WA residents | HHS |
| Outcomes One, Inc. | Jul 2025 | 257.5K WA residents | View breach |
| Morris Hospital & Healthcare Centers | Apr 2023 | 256.6K WA residents | 2 sources ▾ |
| Warner Norcross and Judd | Jun 2021 | 255.2K WA residents | 2 sources ▾ |
| Premier Health Partners | Oct 2020 | 254.8K WA residents | HHS |
| Health Care Management Solutions | Nov 2022 | 254K WA residents | HHS |
| ReproSource Fertility Diagnostics | Aug 2021 | 253.8K WA residents | 3 sources ▾ |
| County of Los Angeles Departments of Health Services and Public Health | Apr 2024 | 252.9K WA residents | HHS |
| AmerisourceBergen Specialty | Feb 2024 | 252.2K WA residents | 2 sources ▾ |
| EngageMED | Aug 2024 | 249.3K WA residents | HHS |
| Lehigh Valley Health Network | May 2023 | 248.4K WA residents | HHS |
| Medical Associates of Brevard | Sept 2025 | 246.7K WA residents | HHS |
| Assured Imaging | May 2020 | 244.8K WA residents | 3 sources ▾ |
| Virginia Mason Medical Center | Feb 2020 | 244.8K WA residents | 2 sources ▾ |
| Clinic of North Texas | Oct 2021 | 244.2K WA residents | 2 sources ▾ |
| Bienville Orthopaedic Specialists | Sept 2023 | 243K WA residents | HHS |
| CF Medical | Feb 2024 | 242.2K WA residents | 2 sources ▾ |
| Medical College of Wisconsin | Nov 2023 | 240.7K WA residents | HHS |
| Knowles Smith & Associates | Apr 2024 | 240.2K WA residents | HHS |
| Highmark | Dec 2022 | 239K WA residents | 3 sources ▾ |
| Fieldtex Products | Aug 2025 | 238.6K WA residents | View breach |
 Bell Ambulance | Feb 2025 | 237.8K WA residents | View breach |
| California Department of Corrections and Rehabilitation | Dec 2021 | 236K WA residents | 2 sources ▾ |
| Fairfax Oral and Maxillofacial Surgery | Jul 2023 | 235.9K WA residents | HHS |
| Marlboro-Chesterfield Pathology | May 2025 | 235.9K WA residents | HHS |
| Yakima Valley Radiology | Aug 2023 | 235.2K WA residents | 3 sources ▾ |
| Keystone Health | Oct 2022 | 235.2K WA residents | HHS |
| University of Tennessee Medical Center | Sept 2020 | 235K WA residents | HHS |
| FMC Services | Jul 2022 | 233.9K WA residents | 2 sources ▾ |
| Good Samaritan Hospital | Oct 2019 | 233.8K WA residents | 2 sources ▾ |
| Iowa Department of Health and Human Services | Apr 2023 | 233.8K WA residents | HHS |
| City of Philadelphia | Jun 2020 | 233.5K WA residents | HHS |
| Woodcreek Provider Services | Dec 2020 | 233.2K WA residents | 2 sources ▾ |
| Cierant | Oct 2024 | 232.5K WA residents | 3 sources ▾ |
| Seacoast Radiology, PA | Jan 2011 | 231.4K WA residents | HHS |
| Avamere Health Services | Jan 2022 | 229.5K WA residents | 2 sources ▾ |
| South Carolina Department of Health and Human Services | Apr 2012 | 228.4K WA residents | HHS |
| Legacy Community Health Services | Jun 2020 | 228K WA residents | HHS |
| Norwood Clinic | Feb 2022 | 228K WA residents | HHS |
| Illinois Gastroenterology | Apr 2022 | 227.9K WA residents | HHS |
| Regional Care | Sept 2024 | 225.7K WA residents | 3 sources ▾ |
| Ambry Genetics | Jan 2020 | 225.4K WA residents | 3 sources ▾ |
| Albany ENT & Allergy Services | May 2023 | 224.5K WA residents | HHS |
| EMS Management and Consultants | Aug 2023 | 223.6K WA residents | HHS |
| Total Health Care | Apr 2021 | 221.5K WA residents | HHS |
| Sunflower Medical Group, P.A | Mar 2025 | 221K WA residents | 2 sources ▾ |
| Health Care Service | Aug 2023 | 220.9K WA residents | HHS |
| Smith, Gambrell & Russell | Jul 2024 | 220K WA residents | HHS |
| Amerita | Mar 2023 | 219.7K WA residents | 2 sources ▾ |
| Episcopal Health Services | Nov 2018 | 218.1K WA residents | HHS |
| Delta Health System | Mar 2024 | 216.5K WA residents | HHS |
| The Nebraska Medical Center and University of Nebraska Medical Center, Affiliated Covered Entities | Nov 2020 | 216.5K WA residents | HHS |
| Marietta Area Health Care | Nov 2021 | 216.5K WA residents | HHS |
| Community First Medical Center | Sept 2023 | 216K WA residents | HHS |
| Harbor | Jun 2025 | 216K WA residents | HHS |
| Hutchinson Clinic, P.A | Feb 2023 | 215.6K WA residents | HHS |
| MultiPlan | Jun 2021 | 215K WA residents | HHS |
| Indian Health Service | Apr 2014 | 214K WA residents | HHS |
| Logan Health Medical Center | Nov 2021 | 213.5K WA residents | 3 sources ▾ |
| Privia Medical Group of Georgia | Aug 2023 | 212.8K WA residents | HHS |
| Florida Digestive Health Specialists | Dec 2021 | 212.5K WA residents | HHS |
| One Brooklyn Health System | Jan 2023 | 211.3K WA residents | HHS |
| Horizon Healthcare RCM | Jun 2025 | 210.9K WA residents | HHS |
| Dameron Hospital | Nov 2023 | 210.7K WA residents | 2 sources ▾ |
| Expert MRI | Oct 2025 | 209.6K WA residents | HHS |
| Precision Anesthesia Billing | Jul 2023 | 209.2K WA residents | HHS |
| UMass Memorial Health Care | Oct 2021 | 209K WA residents | HHS |
| Rehoboth McKinley Christian Health Care Services | Jan 2021 | 207.2K WA residents | 3 sources ▾ |
| Doctors Management Services | Apr 2019 | 206.7K WA residents | HHS |
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Breach data from Have I Been Pwned, licensed under CC BY 4.0; the U.S. Department of Health and Human Services' breach portal; and the public breach notices of the California and Washington Attorneys General (Washington counts are state residents only). Sensitive breaches (such as adult and dating sites), spam lists, fabricated breaches and malware logs aren't listed.