Mojave Radiation Oncology Medical Group
Disclosed Jun 27, 20251 year ago4,403 affectedConfirmed
The covered entity (CE), Mojave Radiation Oncology Medical Group, reported that an employee of its business associate (BA) was the target of an email phishing scheme that compromised the protected health information (PHI) of 4,403 individuals. The PHI involved included clinical, demographic, and financial information. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided complimentary credit monitoring services to the affected individuals and the CE and BA implemented additional administrative, technical, and security safeguards, and retrained workforce members to better protect its PHI.
What is known
| People affected | 4,403 (as reported to HHS) |
|---|---|
| Disclosed | Jun 27, 2025 |
| Happened | Dec 13, 2024 |
| Attack | Hacking |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Mojave Radiation Oncology Medical Groupoag.ca.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Mojave Radiation Oncology Medical Group (Healthcare Provider, CA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| HHS archivetotal | Jun 27, 2025 | 4,403 |
| California AGresidents of CA | Jul 15, 2025 |
History of this record
- 2026-09-25 · attack: unknown to hacking · backfill source
- 2026-09-25 · data_types: [] to ["names","health"] · backfill source
- 2026-09-25 · records_basis: empty to hhs · backfill source
- 2026-09-25 · records: empty to 4403 · backfill source
- 2026-09-25 · disclosed: 2025-07-15 to 2025-06-27 · backfill source
- 2026-09-25 · summary: empty to The covered entity (CE), Mojave Radiation Oncology Medical Group, reported that an employee of its business associate (BA) was the target of an email phishing scheme that compromised the protected health information (PHI) of 4,403 individua · backfill source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.