Acadian Ambulance Service, Inc.: 2,896,985 individuals, Aug 2024.

OCR classifies the incident as a hacking or IT incident, with the breached information held in a network server. Hacking/IT Incident is the type recorded on 41 of the 66 Louisiana filings (62%) and on 83% of all filings submitted in 2024. Network Server appears on 39% of Louisiana filings.

No business associate is recorded on the filing; 32% of Louisiana filings do involve one. At 2,896,985 individuals the breach is 419 times the Louisiana median filing of 6,909 and 724 times the national median of 4,000 across all 7,884 filings. It is one of 149 filings on the register of one million or more individuals.

As of 28 August 2026 the case is listed in the HHS OCR breach portal archive. The archive entry carries no closing summary.

Louisiana's breach notification statute (La. R.S. 51:3071 et seq.) requires notice to affected residents in the most expedient time possible and without unreasonable delay, no later than 60 days from discovery. Its attorney general threshold: all breaches affecting Louisiana 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 2,896,985 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 $464M; the 2026 edition's $192 gives $556M. Both are modelled estimates with the method shown, not costs disclosed by Acadian Ambulance Service, Inc.. 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.