HackingHealthcareHealthcareEmployee Data InvolvedDelayed DiscoveryPIIFinancialGovernment IDEmploymentMediumContained

AltaMed Health Services Corporation

bd_54b39f49fb874a72 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Feb 12, 2026

To disclose

—

Affected

Not disclosed

Confidence

72%

Full breach record for AltaMed Health Services Corporation →9 incidents on file

On December 14, 2025, AltaMed Health Services Corporation experienced a cybersecurity incident that limited access to certain computer systems. An unauthorized individual accessed personal employment information including names, addresses, Social Security numbers, and compensation data. AltaMed initiated incident response protocols, engaged cybersecurity experts, notified law enforcement, and is offering Experian credit monitoring to affected individuals.

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Incident timeline

Dec 14, 2025

Begins

Feb 12, 2026

Filed

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: AltaMed Health Services Corporation
norm: altamed health

Name: AltaMed Health Services Corporation
norm: altamed health
Industry: Healthcarellm

Discovered: —
Breach occurred: Dec 14, 2025
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PIIFinancialGovernment IDEmployment
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified California Office of the Attorney General (SB 24 breach report)

During the incident: Immediately initiated incident response protocols
Took steps to secure our systems and contain the incident
Engaged cybersecurity experts to assist with the investigation
Notified law enforcement
Remained operational and continued to provide care to patients as regularly scheduled
Notifying potentially impacted individuals
Changes made: Implemented additional safeguards and technical security measures to further protect and monitor our systems
Offering complimentary credit monitoring and identity theft protection services through Experian
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.

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.ca.gov/ecrime/databreach/reports/sb24-618676
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 12, 2026
Raw hash: 9d988efc1ef167ae49ffb3aa9ebb3b9096463a84cd1842c850d4415dcf425890

Reporting entityAltaMed Health Services Corporation

Victim entityAltaMed Health Services Corporation

IncidentUnauthorized Access

Stated responseImmediately initiated incident response protocols

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov