Ridgeway Pharmacy, Ltd: 258,920 individuals, Sep 2026.

OCR classifies the incident as a hacking or IT incident, with the breached information held in a network server and another location. Hacking/IT Incident is the type recorded on 21 of the 37 Montana filings (57%) and on 86% of all filings submitted in 2026. Network Server appears on 32% of Montana filings.

A business associate is recorded as present on the filing, as it is on 16% of Montana filings. At 258,920 individuals the breach is 43 times the Montana median filing of 6,000 and 65 times the national median of 4,000 across all 8,045 filings. It is one of 818 filings of 100,000 or more individuals.

As of 22 October 2026 the case is listed by HHS OCR under Cases Currently Under Investigation. OCR has not published a closing summary, so this page is limited to the fields on the filing itself; the archive entry that follows a closed investigation usually adds a short account of what was exposed and what the entity did afterwards.

Montana's breach notification statute (Mont. Code Ann. 30-14-1704 et seq.) requires notice to affected residents without unreasonable delay. Its attorney general threshold: all breaches affecting Montana residents. The HIPAA Breach Notification Rule ran alongside it: notice to affected individuals and to HHS without unreasonable delay and no later than 60 days after discovery, which is the clock that put this filing on the portal.

Multiplying 258,920 individuals by IBM's $160 customer-PII cost per record (Cost of a Data Breach 2025, the figure the site's calculator uses) gives a modelled $41.4M; the 2026 edition's $192 gives $49.7M. Both are modelled estimates with the method shown, not costs disclosed by Ridgeway Pharmacy, Ltd. Because the filing is above the roughly 100,000-record range in which the per-record figure is reliable, the result is an upper bound, not an estimate: fixed costs are spread across far more records at this scale.