Form: Cost-of-Breach DisclosureSource: IBM Cost of a Data BreachFiled: 28 Apr 2026
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Filing TX-20240731-deer-oaks-behavioral-healthHHS OCR Breach Register, Texas

Breach filing

Archived

Deer Oaks Behavioral Health: 171,871 individuals, Jul 2024.

Deer Oaks Behavioral Health reported a breach of unsecured protected health information to the HHS Office for Civil Rights on 31 July 2024. The filing records the organisation as a healthcare provider in Texas and lists 171,871 individuals affected, which makes it the 46th largest of the 633 Texas filings on the register and the 91st largest of the 741 filings submitted nationally in 2024. Among the 60 Texas filings made in 2024 it ranks 11th.

Individuals affected

171,871

As reported to HHS

Modelled cost (IBM 2025)

$27.5M

Upper bound, method shown

Rank in TX

46th

of 633 Texas filings

Rank in 2024

91st

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
171,871
Breach submission date
31 July 2024
Submission year
2024
Type of breach
Hacking/IT Incident
Location of breached information
Network Server
Business associate present
No
Portal status
listed in the HHS OCR breach portal archive
Rank in Texas by size
46th of 633
Rank in 2024 nationally
91st of 741
Texas median filing
4,055 individuals
Register id (derived)
TX-20240731-deer-oaks-behavioral-health

Section F.2 / In context

Where this filing sits in Texas 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 360 of the 633 Texas filings (57%) and on 83% of all filings submitted in 2024. Network Server appears on 45% of Texas filings.

No business associate is recorded on the filing; 27% of Texas filings do involve one. At 171,871 individuals the breach is 42 times the Texas median filing of 4,055 and 43 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.

Texas's breach notification statute (Tex. Bus. & Com. Code 521.053) requires notice to affected residents without unreasonable delay, no later than the 60th day after determining a breach occurred. Its attorney general threshold: 250 or more Texas 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 171,871 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 $27.5M; the 2026 edition's $192 gives $33.0M. Both are modelled estimates with the method shown, not costs disclosed by Deer Oaks Behavioral Health. 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.

Today, the U.S. Department of Health and Human Services (HHS), Office for Civil Rights (OCR) announced a settlement with Deer Oaks - The Behavioral Health Solution (Deer Oaks), a behavioral health provider, resolving potential violations under the Health Insurance Portability and Accountability Act of 1996 (HIPAA) Privacy and Security Rules. Deer Oaks provides psychological and psychiatric services to residents of long-term care and assisted living facilities.

OCR enforces the HIPAA Privacy, Security, and Breach Notification Rules (the HIPAA Rules), which set forth the requirements that covered entities (health plans, health care clearinghouses, and most health care providers) and business associates must follow to protect the privacy and security of protected health information (PHI). The HIPAA Privacy Rule establishes national standards to protect individuals' PHI; sets limits and conditions on the uses and disclosures of PHI; and gives individuals certain rights, including the right to timely access their health records. The HIPAA Security Rule establishes national standards to protect and secure our health care system by requiring administrative, physical, and technical safeguards to ensure the confidentiality, integrity, availability, and security of electronic PHI (ePHI). The Risk Analysis provision of the Security Rule requires a covered entity or business associate to conduct an accurate and thorough assessment of the potential risks and vulnerabilities to the confidentiality, integrity, and availability of ePHI held by that organization.

The settlement resolves an investigation that OCR initiated in May 2023 after receiving a complaint alleging that Deer Oaks impermissibly disclosed the ePHI of individuals, including patient names, dates of birth, patient identification numbers, facilities, and diagnoses, by making patient discharge summaries publicly accessible online. OCR's investigation substantiated the allegations and verified that the ePHI was accessible publicly via the Internet. According to Deer Oaks, a coding error in a now discontinued pilot program for an online patient portal, caused the ePHI to be exposed and cached by search engine providers from at least December 2021 until May 19, 2023. OCR's investigation found that Deer Oaks impermissibly disclosed the ePHI of 35 individuals when it allowed the discharge summaries and initial assessments of those individuals to be accessible to the public online.

OCR expanded the investigation in July 2024 after Deer Oaks experienced a breach on August 29, 2023, of its network resulting from a compromised account. A threat actor claimed to have exfiltrated data and demanded payment to prevent posting the ePHI on the dark web. Deer Oaks provided breach notifications to HHS, 171,871 affected individuals, and the media related to the August 2023 incident.

Based on its investigation into both incidents, OCR found that Deer Oaks failed to conduct an accurate and thorough risk analysis to determine the potential risks and vulnerabilities to the ePHI that it held.

Under the corrective action plan, Deer Oaks committed to take steps to ensure compliance with the HIPAA Rules and protect the security of ePHI, including:

• Annually reviewing and updating as necessary its risk analysis to determine the potential risks and vulnerabilities to the confidentiality, integrity, and availability of its ePHI;

• Developing and implementing a risk management plan to address and mitigate security risks and vulnerabilities identified in its risk analysis;

• Developing, maintaining, and revising, as necessary, certain written policies and procedures to comply with the HIPAA Rules; and

• Providing annual training for each workforce member who has access to PHI on Deer Oaks' written HIPAA policies and procedures.

The resolution agreement and corrective action plan may be found at: https://www.hhs.gov/sites/default/files/ocr-hipaa-racap-deer-oaks.pdf [PDF, 183 KB]

Section F.5 / Modelled cost

171,871 individuals through IBM's per-record figures

Modelled cost / method shown, not a disclosed cost

Upper bound

IBM 2025 customer PII, $160 per record

$27.5M

171,871 x $160

IBM 2026 customer PII, $192 per record

$33.0M

171,871 x $192

Method: individuals affected, as reported by Deer Oaks Behavioral Health 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

Texas statute and the HIPAA rule

State notification statute

Texas: Tex. Bus. & Com. Code 521.053

Notice to individuals
Without unreasonable delay, no later than the 60th day after determining a breach occurred
Attorney general threshold
250 or more Texas residents (No later than the 30th day after determining a breach occurred)
Private right of action
Limited: Indirect recovery via the Deceptive Trade Practices Act (up to treble economic damages for knowing violations)
Penalty
$2,000-$50,000 per violation; additional up to $100 per individual per day, capped at $250,000 per breach

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

Texas filings closest in size

Neighbours by size rank among Texas 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 entityTypeIndividualsSubmitted
Texas Retina AssociatesHealthcare Provider312,86721 Jun 2024
South Texas Oncology and Hematology, PLLCHealthcare Provider175,19519 Apr 2024
LivaNova USA, Inc.Business Associate129,03126 Apr 2024
Cooper Clinic, P.A.Healthcare Provider124,3415 Jan 2024

Index / Companion schedules

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 825.

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.