Grand River Medical Group
Disclosed Feb 8, 20215 years ago37,858 affectedConfirmed
Grand River Medical Group, the covered entity (CE), reported that an employee was the victim of an email phishing attack that compromised the protected health information (PHI) of 37,423 individuals. The PHI involved included names, addresses, Social Security numbers, dates of birth, claims information, medications prescribed, and other treatment information. The CE notified HHS, affected individuals, the media, and provided complimentary credit monitoring services. In response to the breach, the CE strengthened its technical safeguards and retrained its staff on email security. OCR provided the CE with technical assistance regarding its HIPAA Security Rule obligations.
What is known
| People affected | 37,858 (as reported by the organization) |
|---|---|
| Disclosed | Feb 8, 2021 |
| Happened | Oct 19, 2020 |
| Attack | Hacking |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| Indiana Attorney General 2021 data breach report: Grand River Medical Groupin.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Grand River Medical Group (Healthcare Provider, IA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| Indiana AGresidents of IN | Feb 8, 2021 | 20 |
| HHS archivetotal | Feb 12, 2021 | 37,423 |
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 · summary: empty to Grand River Medical Group, the covered entity (CE), reported that an employee was the victim of an email phishing attack that compromised the protected health information (PHI) of 37,423 individuals. The PHI involved included names, address · backfill source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (Indiana AG), confirmed by Indiana AG. Record counts are as reported. Not legal advice.