Breach filing
ArchivedPlaza Radiology, LLC: 569,022 individuals, Dec 2023.
Plaza Radiology, LLC reported a breach of unsecured protected health information to the HHS Office for Civil Rights on 20 December 2023. The filing records the organisation as a healthcare provider in Tennessee and lists 569,022 individuals affected, which makes it the 9th largest of the 196 Tennessee filings on the register and the 56th largest of the 746 filings submitted nationally in 2023. Among the 15 Tennessee filings made in 2023 it ranks 3rd.
Individuals affected
569,022
As reported to HHS
Modelled cost (IBM 2025)
$91.0M
Upper bound, method shown
Rank in TN
9th
of 196 Tennessee filings
Rank in 2023
56th
of 746 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
- 569,022
- Breach submission date
- 20 December 2023
- Submission year
- 2023
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Desktop Computer, Network Server
- Business associate present
- No
- State
- Tennessee (TN)
- Portal status
- listed in the HHS OCR breach portal archive
- Rank in Tennessee by size
- 9th of 196
- Rank in 2023 nationally
- 56th of 746
- Tennessee median filing
- 3,371 individuals
- Register id (derived)
- TN-20231220-plaza-radiology
Section F.2 / In context
Where this filing sits in Tennessee and in 2023
OCR classifies the incident as a hacking or IT incident, with the breached information held in a desktop computer and a network server. Hacking/IT Incident is the type recorded on 121 of the 196 Tennessee filings (62%) and on 82% of all filings submitted in 2023. Desktop Computer appears on 3% of Tennessee filings.
No business associate is recorded on the filing; 36% of Tennessee filings do involve one. At 569,022 individuals the breach is 169 times the Tennessee median filing of 3,371 and 142 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. The archive entry carries no closing summary.
Tennessee's breach notification statute (Tenn. Code Ann. 47-18-2107) requires notice to affected residents immediately, but no later than 45 days from discovery or notification. Its attorney general threshold: no mandatory AG notification for private-sector breaches. 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 569,022 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 $91.0M; the 2026 edition's $192 gives $109M. Both are modelled estimates with the method shown, not costs disclosed by Plaza Radiology, LLC. 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.5 / Modelled cost
569,022 individuals through IBM's per-record figures
Modelled cost / method shown, not a disclosed cost
Upper boundIBM 2025 customer PII, $160 per record
$91.0M
569,022 x $160
IBM 2026 customer PII, $192 per record
$109M
569,022 x $192
Method: individuals affected, as reported by Plaza Radiology, LLC 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
Tennessee statute and the HIPAA rule
State notification statute
Tennessee: Tenn. Code Ann. 47-18-2107
- Notice to individuals
- Immediately, but no later than 45 days from discovery or notification
- Attorney general threshold
- No mandatory AG notification for private-sector breaches
- Private right of action
- Yes: Affected customers may sue to recover damages and obtain injunctive relief
- Penalty
- AG may pursue civil penalties, injunctive relief, and restitution; class actions restricted
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
Tennessee filings closest in size
Neighbours by size rank among Tennessee filings in 2023, topped up from other years where 2023 has too few. Filings of 10,000 or more link to their own page.
| Covered entity | Type | Individuals | Submitted | Breach type | Location | BA |
|---|---|---|---|---|---|---|
| HCA Healthcare | Business Associate | 11,270,000 | 31 Jul 2023 | |||
| Community Health Systems Professional Services Corporations (CHSPSC), LLC | Business Associate | 1,173,555 | 16 Mar 2023 | |||
| Unum Group SACE | Health Plan | 559,315 | 3 Aug 2023 | |||
| Murfreesboro Medical Clinic & SurgiCenter | Healthcare Provider | 559,000 | 21 Jun 2023 |
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 1304.
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.