MalwareHealthcareHealthcareRansomwareData ExfiltratedCustomer Data InvolvedBusiness Associate (HIPAA)PHIIdentity (basic)Government IDHealth (basic)Financial accountMediumActive

Harvard Pilgrim Health Care

bd_10d522138bb443a9 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 17, 2023

Filed

Nov 13, 2025

To disclose

—

Affected

8state residents only

Linked

35 filings

Confidence

66%

Full breach record for Harvard Pilgrim Health Care →14 incidents on file

Supplemental security breach notification filed by Mullen Coughlin LLC on behalf of Harvard Pilgrim Health Care with the Maryland Attorney General. A ransomware incident occurred between March 28, 2023, and April 17, 2023. The breach compromised personal information (names, addresses, DOB, SSN) and protected health information (clinical records, diagnoses) for approximately 8 Maryland residents in this specific supplemental notice. The investigation is ongoing.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 20 days

Mar 28, 2023

Begins

Apr 17, 2023

Discovered

Nov 13, 2025

Filed

This filing is one of 35 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

California State AGbd_6137e2525e0f88892025-01-21 · +296dVerified by operator
Vermont State AGbd_e97c70caa0c2a5f52025-01-21 · +296dVerified by operator
Delaware State AGbd_3d033309f7ace5eb2024-10-03 · +406dVerified by operator
Maine State AGbd_59b7d4f12c5ff2b62024-10-03 · +406dVerified by operator

Show 6 more filings ↓up to 596d gap

California State AGbd_7d6e82e2351b46c62024-10-03 · +406dVerified by operator
New Hampshire State AGbd_9b1c4d63a64d8aab2024-10-03 · +406dVerified by operator
Maine State AGbd_6228e5282fce12112024-03-27 · +596dVerified by operator
Delaware State AGbd_653dd03a96a630572024-03-27 · +596dVerified by operator
New Hampshire State AGbd_c2298923021059572024-03-27 · +596dVerified by operator
California State AGbd_dbc80eaf19d4bfa12024-03-27 · +596dVerified by operator

Showing first 10 of 34 linked disclosures.

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Harvard Pilgrim Health Care
norm: harvard pilgrim health care
Domain: point32health.org
Industry: Healthcarellm

Discovered: Apr 17, 2023
Breach occurred: Mar 28, 2023 – Apr 17, 2023
Undetected for: 20 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 21, 2025
Affected individuals: 8state-resident count only
Data types: Identity (basic)Government IDHealth (basic)Financial account
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: notified law enforcement and regulators

During the incident: Took its systems offline to contain the threat
Notified law enforcement and regulators
Worked with third-party cybersecurity experts to conduct a thorough investigation
Began notifying potentially impacted individuals by posting notice to its website
Providing notice to statewide media in all fifty (50) states
Notifying providers, brokers and employer groups
Providing written notice of this incident to individuals identified through its investigation
Engaged third-party forensic experts to assist in the investigation
Implemented additional cybersecurity safeguards to our existing robust infrastructure
Changes made: Implemented additional cybersecurity safeguards to our existing robust infrastructure to better minimize the likelihood of this type of event occurring again
Providing you with the opportunity to register for two (2) years of complimentary credit monitoring and identity protection services through IDX
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 6 states

View merged incident ↗

Maine State AGMar 27 · first

Delaware State AGMar 27 · first

New Hampshire State AGMar 27 · first

California State AGMar 27 · first

Delaware State AG+190d

Maine State AG+190d

California State AG+190d

New Hampshire State AG+190d

California State AG+300d

Vermont State AG+300d

Maryland State AG+596d · this page

Pattern: first filing Mar 27 (ME), last Nov 13 (MD) — a 596-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 34 — the full spread may be wider.

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://oag.maryland.gov/resources-info/SBN%20Documents/2025/ITU-372135.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 13, 2025
Raw hash: be3e7f22695a45ea2921c7191b1c84232c488999b3773742ab4b17b408b776d9

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityHarvard Pilgrim Health Care

Incidentdiscovered Apr 17, 2023

Stated responseTook its systems offline to contain the threat

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.maryland.gov