Form: Cost-of-Breach DisclosureSource: IBM Cost of a Data BreachFiled: 28 Apr 2026
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Filing AZ-20160803-banner-healthHHS OCR Breach Register, Arizona

Breach filing

Archived

Banner Health: 3,620,000 individuals, Aug 2016.

Banner Health reported a breach of unsecured protected health information to the HHS Office for Civil Rights on 3 August 2016. The filing records the organisation as a healthcare provider in Arizona and lists 3,620,000 individuals affected, which makes it the 1st largest of the 164 Arizona filings on the register and the 1st largest of the 328 filings submitted nationally in 2016. Among the 9 Arizona filings made in 2016 it ranks 1st.

Individuals affected

3,620,000

As reported to HHS

Modelled cost (IBM 2025)

$579M

Upper bound, method shown

Rank in AZ

1st

of 164 Arizona filings

Rank in 2016

1st

of 328 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
3,620,000
Breach submission date
3 August 2016
Submission year
2016
Type of breach
Hacking/IT Incident
Location of breached information
Network Server, Other
Business associate present
No
Portal status
listed in the HHS OCR breach portal archive
Rank in Arizona by size
1st of 164
Rank in 2016 nationally
1st of 328
Arizona median filing
3,146 individuals
Register id (derived)
AZ-20160803-banner-health

Section F.2 / In context

Where this filing sits in Arizona and in 2016

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 94 of the 164 Arizona filings (57%) and on 35% of all filings submitted in 2016. Network Server appears on 43% of Arizona filings.

No business associate is recorded on the filing; 21% of Arizona filings do involve one. At 3,620,000 individuals the breach is 1,151 times the Arizona median filing of 3,146 and 905 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. OCR's closing summary of the case is reproduced in full below.

Arizona's breach notification statute (A.R.S. 18-551, 18-552) requires notice to affected residents within 45 days after determining a breach occurred. Its attorney general threshold: more than 1,000 Arizona residents (AG and Dept. of Homeland Security). 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 3,620,000 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 $579M; the 2026 edition's $192 gives $695M. Both are modelled estimates with the method shown, not costs disclosed by Banner 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.

The U.S. Department of Health and Human Services' Office for Civil Rights (OCR) announced a settlement with Banner Health Affiliated Covered Entities ("Banner Health"), a nonprofit health system headquartered in Phoenix, Arizona, to resolve a data breach resulting from a hacking incident by a threat actor in 2016 which disclosed the protected health information of 2.81 million consumers. The settlement is regarding the Health Insurance Portability and Accountability Act (HIPAA) Security Rule which works to help protect health information and data from cybersecurity attacks. The potential violations specifically include: the lack of an analysis to determine risks and vulnerabilities to electronic protected health information across the organization, insufficient monitoring of its health information systems' activity to protect against a cyber-attack, failure to implement an authentication process to safeguard its electronic protected health information, and failure to have security measures in place to protect electronic protected health information from unauthorized access when it was being transmitted electronically. As a result, Banner Health paid $1,250,000 to OCR and agreed to implement a corrective action plan, which identifies steps Banner Health will take to resolve these potential violations of the HIPAA Security Rule and protect the security of electronic patient health information.

"Hackers continue to threaten the privacy and security of patient information held by health care organizations, including our nation's hospitals," said OCR Director Melanie Fontes Rainer. "It is imperative that hospitals and other covered entities and business associates be vigilant in taking robust steps to protect their systems, data, and records, and this begins with understanding their risks, and taking action to prevent, respond to and combat such cyber-attacks. The Office for Civil Rights provides help and support to health care organizations to protect against cyber security threats and comply with their obligations under the HIPAA Security Rule. Cyber security is on all of us, and we must take steps to protect our health care systems from these attacks."

In November 2016, OCR initiated an investigation of Banner Health following the receipt of a breach report stating that a threat actor had gained unauthorized access to electronic protected health information, potentially affecting millions. The hacker accessed protected health information that included patient names, physician names, dates of birth, addresses, Social Security numbers, clinical details, dates of service, claims information, lab results, medications, diagnoses and conditions, and health insurance information.

Banner Health is one of the largest non-profit health systems in the country, with over 50,000 employees and operating in six states. Banner Health is the largest employer in Arizona, and one of the largest in northern Colorado. OCR's investigation found evidence of long term, pervasive noncompliance with the HIPAA Security Rule across Banner Health's organization, a serious concern given the size of this covered entity. Organizations must be proactive in their efforts to regularly monitor system activity for hacking incidents and have measures in place to sufficiently safeguard patient information from risk across their entire network.

In addition to the monetary settlement, Banner Health will undertake steps under a comprehensive corrective action plan that will be monitored for two years by OCR to ensure compliance with the HIPAA Security Rule.

Section F.5 / Modelled cost

3,620,000 individuals through IBM's per-record figures

Modelled cost / method shown, not a disclosed cost

Upper bound

IBM 2025 customer PII, $160 per record

$579M

3,620,000 x $160

IBM 2026 customer PII, $192 per record

$695M

3,620,000 x $192

Method: individuals affected, as reported by Banner 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

Arizona statute and the HIPAA rule

State notification statute

Arizona: A.R.S. 18-551, 18-552

Notice to individuals
Within 45 days after determining a breach occurred
Attorney general threshold
More than 1,000 Arizona residents (AG and Dept. of Homeland Security) (Within the same 45-day window)
Private right of action
No: Only the Arizona Attorney General may enforce
Penalty
Up to $10,000 per affected individual, capped at $500,000 per breach, under the Consumer Fraud Act

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

Arizona filings closest in size

Neighbours by size rank among Arizona filings in 2016, topped up from other years where 2016 has too few. Filings of 10,000 or more link to their own page.

Covered entityTypeIndividualsSubmitted
Medical Management Resource Group, L.L.C.Business Associate2,264,1576 Feb 2024
OnePoint Patient CareHealthcare Provider1,741,15214 Oct 2024
SimonMed ImagingHealthcare Provider1,275,66927 Mar 2025
Valley Anesthesiology Consultants, Inc. d/b/a Valley Anesthesiology and Pain ConsultantsHealthcare Provider882,59012 Aug 2016
Francisco Jaume, D.O.Healthcare Provider14,2364 Oct 2016

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 5507.

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.