Breach intelligence · CA
80 reported healthcare data breach incidents affecting 82.7M individuals. Sourced from 7 federal and community intelligence feeds. Updated nightly.
80
Incidents reported
82.7M
Individuals affected
Hacking
Top attack vector
Stable
6-month trend
Recent incidents
| Date | Entity | Individuals | Source | Severity |
|---|---|---|---|---|
| May 20, 2026 | Family Health Centers of San Diego | 523 | Hhs Breach | Medium |
| May 20, 2026 | Palomar Health Medical Group | 501 | Hhs Breach | Medium |
| May 20, 2026 | Stockton Cardiology Medical Group | 90,000 | Hhs Breach | High |
| May 17, 2026 | Glendora Surgery Center | 501 | Hhs Breach | Medium |
| May 11, 2026 | Healthcare In Action | 1,143 | Hhs Breach | High |
| May 8, 2026 | Ouster, Inc. | 574 | Hhs Breach | Medium |
| May 5, 2026 | Fenwick & West Group Health Plan | 1,740 | Hhs Breach | High |
| Apr 29, 2026 | Amyris Incorporated Health and Welfare Plan | 2,042 | Hhs Breach | High |
| Apr 27, 2026 | L.A. Care Health Plan | 2,885 | Hhs Breach | High |
| Apr 27, 2026 | Branch Metrics, Inc. | 857 | Hhs Breach | Medium |
| Apr 27, 2026 | CardioFit Medical Group, Inc. | 7,243 | Hhs Breach | High |
| Apr 27, 2026 | Providence St. Joseph Orange | 11,329 | Hhs Breach | High |
| Apr 26, 2026 | City Health, a medical corporation | 65,000 | Hhs Breach | High |
| Apr 21, 2026 | La Clinica de La Raza, Inc. (La Clinica) | 11,403 | Hhs Breach | High |
| Apr 17, 2026 | EDINGER MEDICAL GROUP | 1,246 | Hhs Breach | High |
| Apr 13, 2026 | Tieu Dental Corporation | 8,918 | Hhs Breach | High |
| Apr 6, 2026 | Nephrology Associates Medical Group, Inc | 4,631 | Hhs Breach | High |
| Apr 2, 2026 | Native American Health Center | 2,451 | Hhs Breach | High |
| Apr 2, 2026 | Indian Health Center of Santa Clara Valley | 3,276 | Hhs Breach | High |
| Mar 23, 2026 | AltaMed Health Services Corporation | 501 | Hhs Breach | Medium |
Swipe to view full table →
Most affected entities
#1
3
incidents
500
individuals
#2
2
incidents
523
individuals
#3
2
incidents
2.0M
individuals
#4
2
incidents
-2
individuals
#5
2
incidents
65K
individuals
Attack vectors
Breakdown of breach types reported across 80 incidents in California. Understanding which vectors dominate helps practices prioritize their security controls.
California compliance requirements
Beyond federal HIPAA requirements, California has its own breach notification law that may impose additional obligations on healthcare practices operating in the state.
Cal. Civ. Code § 1798.29, § 1798.82
Notification deadline
Most expedient time possible
No fixed deadline — but unreasonable delay can result in enforcement action.
Attorney General notification
Required (500+ individuals)
The California Consumer Privacy Act and California Privacy Rights Act impose additional requirements on consumer data, including health-related marketing data not covered by HIPAA.
California's CMIA provides patient privacy protections that exceed HIPAA in several areas, including a private right of action for patients whose medical information is improperly disclosed.
When notifying the AG, California requires a copy of the notification letter sent to affected individuals.
This is a general reference based on current California law. Consult legal counsel for state-specific compliance obligations. Source: Cal. Civ. Code § 1798.29, § 1798.82. Verified April 2026.
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FAQ
Patient Protect tracks 80 reported healthcare data breach incidents in California, affecting approximately 82.7M individuals. Data is sourced from HHS OCR, State Attorney General offices, FTC enforcement, and community intelligence — updated nightly.
The most frequently reported breach vector in California is Hacking/IT Incident, accounting for 35 of 80 incidents. Other/Unknown is the second most common with 28 incidents.
Independent healthcare practices are the fastest-growing target for healthcare cyberattacks nationwide — attacks on small providers have increased 6x since 2021. California practices face the same threat landscape with fewer resources to defend against it. Patient Protect provides breach prevention specifically for independent practices starting at $39/month.
California requires breach notification within most expedient time possible, and requires notification to the Attorney General when 500 or more individuals are affected. These requirements apply in addition to federal HIPAA's 60-day notification deadline. Reference: Cal. Civ. Code § 1798.29, § 1798.82.
Explore the full breach intelligence dashboard with 12 analytical views, risk forecasting, and attack chain visualization.
Open full dashboardData Disclaimer: This data is aggregated from publicly available sources including the HHS OCR Breach Portal, FTC, state AG databases, CISA advisories, and curated reporting. Certain records are algorithmically modeled from news sources and labeled accordingly. Data is provided “as-is” for informational purposes only. Inclusion of any entity does not imply wrongdoing. Users must independently verify information before relying on it. See Terms of Use.
Editorial coverage · From our partner publication
Editorial analysis of the breaches and enforcement actions reshaping California's threat landscape. From the Patient Protect publication.
May 25, 2026 · Breach
Radiology Associates of Richmond disclosed a data breach affecting 266,000 individuals after threat actors exfiltrated files containing names and protected health information from its systems.
Read on HIPAA Pulse
May 22, 2026 · Breach
Radiology Associates of Richmond disclosed a second data breach in under two years, with the latest incident affecting 266,000 patients and reported to Maine's Attorney General in May 2026.
Read on HIPAA Pulse
May 22, 2026 · Breach
Verizon's 2026 Data Breach Investigations Report finds healthcare facing a sharper threat from social engineering while ransomware and third-party vendor compromises continue to drive significant breach volume across the sector.
Read on HIPAA Pulse
May 18, 2026 · Breach
A healthcare software vendor serving the congressional physician's office was breached in early March, exposing prescription data — but lawmakers were not notified until more than two months after the intrusion.
Read on HIPAA Pulse
May 16, 2026 · Litigation
A federal jury in Michigan convicted a home health care agency owner and nurse of running a $1.6 million Medicare fraud scheme built on stolen patient records from 2018 to 2021.
Read on HIPAA Pulse
May 13, 2026 · Breach
OpenLoop Health, a telehealth platform serving independent practices and health systems, disclosed a January 2025 breach that exposed personal data belonging to roughly 716,000 individuals.
Read on HIPAA Pulse
HIPAA Pulse is the editorial publication of Patient Protect. PP’s HIPAA Response translates each story into operational guidance.
