WY · HHS OCR reports
HIPAA breaches in Wyoming
HIPAA breaches affecting 500 or more individuals reported to HHS OCR by covered entities listed in Wyoming.
Reports
19
Individuals affected
287,419
Under investigation
0
Top type: Unauthorized Access/Disclosure
State breach notification law
Wyo. Stat. Ann. §§ 40-12-501 to 40-12-509 (Computer Security Breach; Notice to Affected Persons) (amended 2015)
Timing: Not applicable - government agencies not covered Wyoming's notification requirements do not apply to
Read the Wyoming data breach notification law summaryAll reports, newest first
Page 1 of 1. 19 reports.
| Covered entity | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|
| Rocky Mountain Oncology Care | Healthcare Provider | 5,615 | Oct 24, 2025 | Hacking/IT Incident | Archive (closed) |
| Rocky Mountain Oncology Care | Healthcare Provider | 10,268 | Jun 27, 2025 | Hacking/IT Incident | Archive (closed) |
| Elkhorn Valley Rehabilitation Hospital | Healthcare Provider | 3,636 | Mar 29, 2024 | Hacking/IT Incident | Archive (closed) |
| Cheyenne Radiology Group & MRI, P.C. | Healthcare Provider | 12,222 | Feb 9, 2023 | Hacking/IT Incident | Archive (closed) |
| Cheyenne Regional Medical Center | Healthcare Provider | 1,652 | Jul 5, 2022 | Unauthorized Access/Disclosure | Archive (closed) |
| Wind River Family and Community Health Care | Healthcare Provider | 8,946 | Dec 7, 2021 | Unauthorized Access/Disclosure | Archive (closed) |
| Wyoming Department of Health | Health Plan | 164,010 | Apr 29, 2021 | Unauthorized Access/Disclosure | Archive (closed) |
| Campbell County Hospital District | Healthcare Provider | 900 | Feb 24, 2021 | Unauthorized Access/Disclosure | Archive (closed) |
| Cheyenne Regional Medical Center | Healthcare Provider | 17,549 | Dec 10, 2019 | Hacking/IT Incident | Archive (closed) |
| Wyoming Department of Health | Health Plan | 2,154 | Jun 25, 2019 | Unauthorized Access/Disclosure | Archive (closed) |
| Gillette Medical Imaging | Healthcare Provider | 4,476 | Jan 18, 2018 | Unauthorized Access/Disclosure | Archive (closed) |
| High Plains Surgical Associates | Healthcare Provider | 607 | Jan 15, 2018 | Unauthorized Access/Disclosure | Archive (closed) |
| Wyoming Medical Center | Healthcare Provider | 3,184 | Apr 20, 2016 | Hacking/IT Incident | Archive (closed) |
| North Big Horn Hospital | Healthcare Provider | 1,607 | Dec 1, 2014 | Loss | Archive (closed) |
| Wyoming Department of Health | Health Plan | 11,935 | Dec 19, 2013 | Hacking/IT Incident | Archive (closed) |
| Wyoming Department of Health | Health Plan | 11,935 | Dec 16, 2013 | Unauthorized Access/Disclosure | Archive (closed) |
| Hansen and Associates, Inc. | Business Associate | 2,700 | Jul 15, 2013 | Unauthorized Access/Disclosure | Archive (closed) |
| Community Action partnership of Natrona County | Healthcare Provider | 15,000 | Apr 20, 2011 | Theft | Archive (closed) |
| Wyoming Department of Health | Health Plan | 9,023 | Mar 2, 2010 | Unauthorized Access/Disclosure | Archive (closed) |
Source: HHS OCR Breach Portal, OCR export October 2026.