Breach filing
ArchivedMcLaren Medical Group, Mid-Michigan Physicians Imaging Center: 106,008 individuals, Aug 2017.
McLaren Medical Group, Mid-Michigan Physicians Imaging Center reported a breach of unsecured protected health information to the HHS Office for Civil Rights on 24 August 2017. The filing records the organisation as a healthcare provider in Michigan and lists 106,008 individuals affected, which makes it the 18th largest of the 238 Michigan filings on the register and the 9th largest of the 358 filings submitted nationally in 2017. Among the 14 Michigan filings made in 2017 it ranks 2nd.
Individuals affected
106,008
As reported to HHS
Modelled cost (IBM 2025)
$17.0M
Upper bound, method shown
Rank in MI
18th
of 238 Michigan filings
Rank in 2017
9th
of 358 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
- 106,008
- Breach submission date
- 24 August 2017
- Submission year
- 2017
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Network Server
- Business associate present
- No
- State
- Michigan (MI)
- Portal status
- listed in the HHS OCR breach portal archive
- Rank in Michigan by size
- 18th of 238
- Rank in 2017 nationally
- 9th of 358
- Michigan median filing
- 3,754 individuals
- Register id (derived)
- MI-20170824-mclaren-medical-group-mid-michigan-physi
Section F.2 / In context
Where this filing sits in Michigan and in 2017
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 148 of the 238 Michigan filings (62%) and on 42% of all filings submitted in 2017. Network Server appears on 45% of Michigan filings.
No business associate is recorded on the filing; 30% of Michigan filings do involve one. At 106,008 individuals the breach is 28 times the Michigan median filing of 3,754 and 27 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.
Michigan's breach notification statute (MCL 445.72) requires notice to affected residents without unreasonable delay. Its attorney general threshold: not currently required (pending SB 360 would require it at 100+ 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 106,008 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 $17.0M; the 2026 edition's $192 gives $20.4M. Both are modelled estimates with the method shown, not costs disclosed by McLaren Medical Group, Mid-Michigan Physicians Imaging 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), McLaren Medical Group, Mid-Michigan Physicians Imaging Center, reported that it experienced a cyber-attack that compromised the protected health information (PHI) of 106,008 individuals. The PHI involved included names, dates of birth, addresses, phone numbers, diagnoses, and Social Security numbers. The CE notified HHS, the affected individuals, and the media. In its mitigation efforts, the CE implemented additional administrative, technical and security safeguards to better protect PHI.
Section F.5 / Modelled cost
106,008 individuals through IBM's per-record figures
Modelled cost / method shown, not a disclosed cost
Upper boundIBM 2025 customer PII, $160 per record
$17.0M
106,008 x $160
IBM 2026 customer PII, $192 per record
$20.4M
106,008 x $192
Method: individuals affected, as reported by McLaren Medical Group, Mid-Michigan Physicians Imaging 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
Michigan statute and the HIPAA rule
State notification statute
Michigan: MCL 445.72
Identity Theft Protection Act
- Notice to individuals
- Without unreasonable delay
- Attorney general threshold
- Not currently required (pending SB 360 would require it at 100+ residents)
- Private right of action
- No: No PROA under the statute; other theories such as negligence may apply
- Penalty
- Up to $250 per failed notification, capped at $750,000 per breach event
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
Michigan filings closest in size
Neighbours by size rank among Michigan filings in 2017, topped up from other years where 2017 has too few. Filings of 10,000 or more link to their own page.
| Covered entity | Type | Individuals | Submitted | Breach type | Location | BA |
|---|---|---|---|---|---|---|
| Airway Oxygen, Inc. | Healthcare Provider | 500,000 | 16 Jun 2017 | |||
| Henry Ford Health System | Healthcare Provider | 43,563 | 1 Dec 2017 | |||
| Bronson Healthcare Group | Healthcare Provider | 8,256 | 5 Dec 2017 |
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 5129.
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.