The worst year for healthcare security incidents — in terms of the number of breaches reported — was 2017, with two breaches involving more than half a million records.
Here are the 15 largest breaches in the last three years, and the number of records compromised.
1. Anthem Affiliated Covered Entity (2015): 78,800,000
2. Premera Blue Cross (2015): 11,000,000
3. Excellus Health Plan (2015): 10,000,000
4. UC Los Angeles Health (2015): 4,500,000
5. Medical Informatics Engineering (2015): 3,900,000
6. Banner Health (Phoenix) (2016): 3,620,000
7. Newkirk Products. (2016): 3,466,120
8. 21st Century Oncology (Fort Myers, Fla.) (2016): 2,213,597
9. CareFirst BlueCross BlueShield (2015): 1,100,000
10. Valley Anesthesiology and Pain Consultants (Phoenix) (2016): 882,590
11. County of Los Angeles Departments of Health and Mental Health (2016): 749,017
12. Commonwealth Health Corp. (Bowling Green, Ky.) (2017): 697,800
13. Virginia Department of Medical Assistance Services (2015): 697,586
14. Bon Secours Health System (Marriottsville, Md.) (2016): 651,971
15. Georgia Department of Community Health (2015): 557,779
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