Breach filing
ArchivedBayhealth Medical Center: 497,047 individuals, Oct 2024.
Bayhealth Medical Center reported a breach of unsecured protected health information to the HHS Office for Civil Rights on 4 October 2024. The filing records the organisation as a healthcare provider in Delaware and lists 497,047 individuals affected, which makes it the 3rd largest of the 31 Delaware filings on the register and the 42nd largest of the 741 filings submitted nationally in 2024. Among the 3 Delaware filings made in 2024 it ranks 2nd.
Individuals affected
497,047
As reported to HHS
Modelled cost (IBM 2025)
$79.5M
Upper bound, method shown
Rank in DE
3rd
of 31 Delaware filings
Rank in 2024
42nd
of 741 filings nationally
Section F.1 / The filing
As posted by HHS OCR
Every value below is the portal's own field for this filing, plus its rank within the register.
- Covered entity type
- Healthcare Provider
- Individuals affected
- 497,047
- Breach submission date
- 4 October 2024
- Submission year
- 2024
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- State
- Delaware (DE)
- Portal status
- listed in the HHS OCR breach portal archive
- Rank in Delaware by size
- 3rd of 31
- Rank in 2024 nationally
- 42nd of 741
- Delaware median filing
- 14,095 individuals
- Register id (derived)
- DE-20241004-bayhealth-medical-center
Section F.2 / In context
Where this filing sits in Delaware and in 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 22 of the 31 Delaware filings (71%) and on 83% of all filings submitted in 2024. Network Server is the most common location in the state, appearing on 61% of Delaware filings.
No business associate is recorded on the filing; 39% of Delaware filings do involve one. At 497,047 individuals the breach is 35 times the Delaware median filing of 14,095 and 124 times the national median of 4,000 across all 7,884 filings. It is one of 801 filings of 100,000 or more individuals.
As of 28 August 2026 the case is listed in the HHS OCR breach portal archive. OCR's closing summary of the case is reproduced in full below.
Delaware's breach notification statute (Del. Code tit. 6, Ch. 12B) requires notice to affected residents without unreasonable delay, no later than 60 days after determining a breach occurred. Its attorney general threshold: 500 or more Delaware 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 497,047 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 $79.5M; the 2026 edition's $192 gives $95.4M. Both are modelled estimates with the method shown, not costs disclosed by Bayhealth Medical Center. 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.
Section F.3 / OCR closing summary
The portal's archived description, in full
Written by the Office for Civil Rights when the case was closed and reproduced verbatim from the HHS export.
The covered entity (CE), Bayhealth Medical Center, reported that it experienced a cyberattack that compromised the protected health information (PHI) of 497,047 individuals. The PHI involved included Social Security numbers, addresses, dates of birth, diagnoses/conditions, medications, and other treatment information. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided complimentary credit monitoring services and implemented additional administrative, technical, and security safeguards. Staff were retrained.
Section F.5 / Modelled cost
497,047 individuals through IBM's per-record figures
Modelled cost / method shown, not a disclosed cost
Upper boundIBM 2025 customer PII, $160 per record
$79.5M
497,047 x $160
IBM 2026 customer PII, $192 per record
$95.4M
497,047 x $192
Method: individuals affected, as reported by Bayhealth Medical Center to HHS, multiplied by IBM's customer-PII cost per record (Cost of a Data Breach 2025 Figure 6 and the 2026 edition). No cost has been disclosed by the entity for this filing; the figure is a planning estimate, not a fact about the breach. IBM's per-record figures come from mid-volume breaches and IBM cautions against applying them to breaches involving millions of records; the site's per-record page explains where the multiplication holds and where it breaks down.
Context: IBM's average cost of a healthcare breach is $6.64M in the 2026 report ($7.42M in 2025); the global average across all sectors was $4.44M in 2025.
Cost per record: method and limits / Healthcare breach cost, IBM 2026
Section F.6 / Notification clock
Delaware statute and the HIPAA rule
State notification statute
Delaware: Del. Code tit. 6, Ch. 12B
- Notice to individuals
- Without unreasonable delay, no later than 60 days after determining a breach occurred
- Attorney general threshold
- 500 or more Delaware residents (No later than when individual notices are sent)
- Private right of action
- No: Statute preserves existing common-law and other statutory rights
- Penalty
- Enforced by the AG Consumer Protection Division; may recover direct economic damages
The HIPAA Breach Notification Rule runs alongside the state statute: notice to affected individuals and to HHS without unreasonable delay and no later than 60 days after discovery.
Section F.7 / Peer filings
Delaware filings closest in size
Neighbours by size rank among Delaware filings in 2024, topped up from other years where 2024 has too few. Filings of 10,000 or more link to their own page.
| Covered entity | Type | Individuals | Submitted | Breach type | Location | BA |
|---|---|---|---|---|---|---|
| Cerebral, Inc | Business Associate | 3,179,835 | 1 Mar 2023 | |||
| ConnectOnCall.com, LLC | Business Associate | 914,138 | 11 Dec 2024 | |||
| Simon Eye Management | Healthcare Provider | 144,780 | 14 Sep 2021 | |||
| Brandywine Urology Consultants, PA | Healthcare Provider | 131,825 | 27 Mar 2020 | |||
| AmeriHealth Caritas Delaware | Health Plan | 2,823 | 1 Jul 2024 |
Index / Companion schedules
13 HHS breach register
→Hub: every filing, by state, year and entity.
04 Biggest breaches
→Mega-breaches with primary-source cost figures.
Industry / Healthcare
→IBM 2026: $6.64M average, 13 years at #1.
Regulation / HIPAA penalties
→OCR enforcement tiers and the 60-day rule.
11 50-state laws
→Deadline, AG threshold and penalties per state.
Cost / Per record
→Where the per-record model is reliable.
Provenance
Source: U.S. Department of Health and Human Services, Office for Civil Rights, Breach Portal (breaches affecting 500 or more individuals), retrieved 2026-08-28. Public domain. Individuals affected and dates as reported by the covered entity.
Portal: ocrportal.hhs.gov breach report. Statutory basis: HITECH Act section 13402(e)(4): the Secretary must post a list of breaches of unsecured protected health information affecting 500 or more individuals. Breaches affecting fewer than 500 individuals are reported to OCR annually and are not posted, so they are not on this register. Status wording follows the portal's two tabs ("Cases Currently Under Investigation" and "Archive") as of 28 August 2026; a filing moves to the archive when OCR closes the case. Modelled costs on this site are a method applied to the reported count, using IBM Cost of a Data Breach per-record figures, and are never a cost disclosed by the entity. This row: hhs-breach-archive__2026-08-28.csv, export row 728.
Corrections: if you represent a listed entity and the portal row has been amended, email [email protected] with the portal entry and we will re-pull the export.