MARYLANDHackingHealthcareHealthcarePHIHealth (basic)Identity (basic)Medium

MCS, P.C.

bd_eccd6227d77b2e99 · schema v1 · pii pii-v2

Severity

Medium

Discovered

—

Filed

Feb 2, 2026

To disclose

—

Affected

3,478

Confidence

69%

Full breach record for MCS, P.C. →

MCS, P.C. reported to HHS on 2026-02-02 a Hacking/IT Incident affecting 3478 individuals. Breached information located on Email.

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HIPAA clock✓ HHS notified

⚠ no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.

⚠ No discovery dateThe OCR public portal omits the discovery date, so the 60-day notification clock cannot be evaluated from this source — only that the filing was submitted.

Incident timeline — partial

? — ?

Breach window unknown

Feb 2, 2026

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed3,478 affectedView incident

Name: MCS, P.C.
norm: mcs
Industry: Health Care Services

Name: MCS, P.C.
norm: mcs
Industry: Healthcaresource default

Discovered: Not extracted — the OCR public portal omits it
Materiality determined: —
Notification sent: —
Affected individuals: 3,478nationwide
Data types: PHIHealth (basic)Identity (basic)
HHS breach type: Hacking / IT incident
Where the data lived: Email
Covered-entity type: Business associate
Attack vector: Unauthorized Access
MITRE ATT&CK: T1566 Phishing
Threat actor: External
Regulator citations: Notified HHS
Third party: via MCS, P.C.business associate

Compliance flags: HHS notified
Discovery-date grounding: no discovery dateNo discovery date was extracted, so no notification clock can be evaluated.
Clock breakdown: Statute Window Elapsed Threshold Status
HIPAA
Discovered: not extracted
→ Notified: not extracted
— regulatory submission HHS notified

Statute	Window	Elapsed	Threshold	Status
HIPAA	Discovered: not extracted → Notified: not extracted	—	regulatory submission	HHS notified

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://ocrportal.hhs.gov/ocr/breach/breach_report.jsf
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Feb 2, 2026
Raw hash: 4938ae48a90a8ecd79cc8630918b200251d103fce09ee19cb05f8110328d79ea

AI-assisted summary above. The structured extract on this page was generated from the document below. Inspect the source to verify or correct any field.

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Reporting entityMCS, P.C.

Victim entityMCS, P.C.

IncidentUnauthorized Access

ComplianceHHS notified

Extraction provenanceno artifact recorded

Source provenanceocrportal.hhs.gov

Source filing