DisclosureLens
HackingHealthcareHealthcareCustomer Data InvolvedDelayed DiscoveryMedium

Grand River Medical Group

bd_b1dfa9db3f811958 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 22, 2020

Filed

Feb 12, 2021

To disclose

16 weeks

Affected · nationwide

37,8582 in this filing

Linked

4 filings

Confidence

65%
Full breach record for Grand River Medical Group →

Healthcare provider Grand River Medical Group, P.C. experienced an external system breach between October 19 and October 22, 2020. The incident was discovered on October 22, 2020, with potential data compromise confirmed by a forensic firm on December 15, 2020. The breach affected 37,858 individuals, who were notified in February 2021. The company offered 12 months of identity protection services to those affected.

Maine clockDiscovered Oct 22, 2020 → Filed with AG Feb 12, 2021113d ✗ ME AG >90d16 weeks discovery → filing
⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 3 days
discovery → filing · 16 weeks / 113 days

Oct 19, 2020

Begins

Oct 22, 2020

Discovered

Feb 12, 2021

Filed

vs. sector median

+4 wks slower

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Filing propagation · 4 filings · 4 states

View merged incident ↗
Montana State AGFeb 8 · first
Indiana State AGFeb 8 · first
HHS OCR+4d
Maine State AG+4d · this page

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.