Breach filing
Archived21st Century Oncology: 2,213,597 individuals, Mar 2016.
21st Century Oncology reported a breach of unsecured protected health information to the HHS Office for Civil Rights on 4 March 2016. The filing records the organisation as a healthcare provider in Florida and lists 2,213,597 individuals affected, which makes it the 8th largest of the 463 Florida filings on the register and the 3rd largest of the 328 filings submitted nationally in 2016. Among the 27 Florida filings made in 2016 it ranks 1st.
Individuals affected
2,213,597
As reported to HHS
Modelled cost (IBM 2025)
$354M
Upper bound, method shown
Rank in FL
8th
of 463 Florida filings
Rank in 2016
3rd
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
- 2,213,597
- Breach submission date
- 4 March 2016
- Submission year
- 2016
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- State
- Florida (FL)
- Portal status
- listed in the HHS OCR breach portal archive
- Rank in Florida by size
- 8th of 463
- Rank in 2016 nationally
- 3rd of 328
- Florida median filing
- 4,912 individuals
- Register id (derived)
- FL-20160304-21st-century-oncology
Section F.2 / In context
Where this filing sits in Florida and in 2016
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 256 of the 463 Florida filings (55%) and on 35% of all filings submitted in 2016. Network Server appears on 45% of Florida filings.
No business associate is recorded on the filing; 25% of Florida filings do involve one. At 2,213,597 individuals the breach is 451 times the Florida median filing of 4,912 and 553 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.
Florida's breach notification statute (Fla. Stat. 501.171) requires notice to affected residents within 30 days of determining a breach occurred (up to 15-day extension for good cause). Its attorney general threshold: 500 or more Florida 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 2,213,597 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 $354M; the 2026 edition's $192 gives $425M. Both are modelled estimates with the method shown, not costs disclosed by 21st Century Oncology. 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.
Failure to protect the health records of millions of persons costs entity millions of dollars 21st Century Oncology, Inc. (21CO) has agreed to pay $2.3 million in lieu of potential civil money penalties to the U.S. Department of Health and Human Services (HHS) Office for Civil Rights (OCR) and adopt a comprehensive corrective action plan to settle potential violations of the Health Insurance Portability and Accountability Act (HIPAA) Privacy and Security Rules. 21CO is a provider of cancer care services and radiation oncology. With their headquarters located in Fort Myers, Florida, 21CO operates and manages 179 treatment centers, including 143 centers located in 17 states and 36 centers located in seven countries in Latin America.
On two separate occasions in 2015, the Federal Bureau of Investigation (FBI) notified 21CO that patient information was illegally obtained by an unauthorized third party and produced 21CO patient files purchased by an FBI informant. As part of its internal investigation, 21CO determined that the attacker may have accessed 21CO's network SQL database as early as October 3, 2015, through the remote desktop protocol from an exchange server within 21CO's network. 21CO determined that 2,213,597 individuals were affected by the impermissible access to their names, social security numbers, physicians' names, diagnoses, treatment, and insurance information. OCR's subsequent investigation revealed that 21CO failed to conduct an accurate and thorough assessment of the potential risks and vulnerabilities to the confidentiality, integrity, and availability of the electronic protected health information (ePHI); failed to implement security measures sufficient to reduce risks and vulnerabilities to a reasonable and appropriate level; failed to implement procedures to regularly review records of information system activity, such as audit logs, access reports, and security incident tracking reports; and disclosed protected health information (PHI) to third party vendors without a written business associate agreement.
"People need to trust that their private health information will remain exactly that; private," said OCR Director Roger Severino. "It's not just my hope that covered entities will learn from this example and proactively find and address their security risks, it's what the law requires."
In addition to a $2.3 million monetary settlement, a corrective action plan requires 21CO to complete a risk analysis and risk management plan, revise policies and procedures, educate its workforce on policies and procedures, provide all maintained business associate agreements to OCR, and submit an internal monitoring plan.
On May 25, 2017, 21CO filed for Chapter 11 bankruptcy protection in the United States Bankruptcy Court for the Southern District of New York. The settlement with OCR will resolve OCR's claims against 21CO and the corrective action plan will ensure that the reorganized entity emerges from bankruptcy with a strong HIPAA compliance program in place. The settlement with OCR was approved by the Bankruptcy Court on December 11, 2017.
The resolution agreement and corrective action plan may be found on the OCR website at http://www.hhs.gov/hipaa/for-professionals/compliance-enforcement/agreements/21CO/index.html.
Section F.5 / Modelled cost
2,213,597 individuals through IBM's per-record figures
Modelled cost / method shown, not a disclosed cost
Upper boundIBM 2025 customer PII, $160 per record
$354M
2,213,597 x $160
IBM 2026 customer PII, $192 per record
$425M
2,213,597 x $192
Method: individuals affected, as reported by 21st Century Oncology 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
Florida statute and the HIPAA rule
State notification statute
Florida: Fla. Stat. 501.171
Florida Information Protection Act (FIPA)
- Notice to individuals
- Within 30 days of determining a breach occurred (up to 15-day extension for good cause)
- Attorney general threshold
- 500 or more Florida residents (Within 30 days of the breach determination)
- Private right of action
- No: FIPA does not permit direct individual lawsuits; AG enforcement only
- Penalty
- Escalating civil penalties up to $500,000 per breach; also an unfair or deceptive trade practice
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
Florida filings closest in size
Neighbours by size rank among Florida 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 entity | Type | Individuals | Submitted | Breach type | Location | BA |
|---|---|---|---|---|---|---|
| Lincare Holdings Inc. | Healthcare Provider | 2,918,444 | 26 Oct 2021 | |||
| Florida Health Sciences Center, Inc. dba Tampa General Hospital | Healthcare Provider | 2,430,920 | 28 Jul 2023 | |||
| Arietis Health, LLC | Business Associate | 1,975,066 | 29 Sep 2023 | |||
| Radiology Regional Center, PA | Healthcare Provider | 483,063 | 12 Feb 2016 | |||
| Southeast Eye Institute, P.A. dba eye Associates of Pinellas | Healthcare Provider | 87,314 | 5 May 2016 |
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 5642.
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.