Western Health Advantage
Disclosed Dec 13, 20196 years ago869 affectedConfirmed
Cognizant TriZetto Software Group, Inc., a business associate (BA) of Western Health Advantage, experienced a communication error while performing routine maintenance on its servers which allowed another covered entity to inadvertently download the electronic protected health information (ePHI) of 869 individuals. The ePHI involved included names, birthdates, addresses, diagnoses, clinical information, and other treatment information. The CE notified HHS, affected individuals, and the media. In its mitigation efforts, the BA implemented additional technical safeguards to better protect its ePHI.
What is known
| People affected | 869 (as reported to HHS) |
|---|---|
| Disclosed | Dec 13, 2019 |
| Happened | Oct 20, 2019 |
| Attack | Insider |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Western Health Advantageoag.ca.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Western Health Advantage (Health Plan, CA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| California AGresidents of CA | Dec 13, 2019 | |
| HHS archivetotal | Dec 13, 2019 | 869 |
History of this record
- 2026-09-25 · attack: unknown to insider · 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 869 · backfill source
- 2026-09-25 · summary: empty to Cognizant TriZetto Software Group, Inc., a business associate (BA) of Western Health Advantage, experienced a communication error while performing routine maintenance on its servers which allowed another covered entity to inadvertently down · 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.