Shelby County Chris A Myrtue Memorial Hospital ("MMC"): 32,717 individuals, Jul 2025.

OCR classifies the incident as unauthorized access or disclosure, with the breached information held in a network server and another location. Unauthorized Access/Disclosure is the type recorded on 25 of the 102 Iowa filings (25%) and on 18% of all filings submitted in 2025. Network Server is the most common location in the state, appearing on 51% of Iowa filings.

No business associate is recorded on the filing; 34% of Iowa filings do involve one. At 32,717 individuals the breach is 9.8 times the Iowa median filing of 3,340 and 8.2 times the national median of 4,013 across all 8,072 filings. It sits in the 10,000 to 99,999 band, which holds 1,989 filings.

As of 5 November 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.

Iowa's breach notification statute (Iowa Code Ch. 715C) requires notice to affected residents in the most expedient time possible and without unreasonable delay. Its attorney general threshold: 500 or more Iowa 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 32,717 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 $5.23M; the 2026 edition's $192 gives $6.28M. Both are modelled estimates with the method shown, not costs disclosed by Shelby County Chris A Myrtue Memorial Hospital ("MMC"). For scale, IBM's 2026 average cost of a healthcare breach is $6.64M, so this filing models at 0.9 times the sector average.