Breach intelligence · CA
97 reported healthcare data breach incidents affecting 11.8M individuals. Sourced from 7 federal and community intelligence feeds. Updated nightly.
97
Incidents reported
11.8M
Individuals affected
Hacking
Top attack vector
Stable
6-month trend
Recent incidents
| Date | Entity | Individuals | Source | Severity |
|---|---|---|---|---|
| Apr 13, 2026 | Tieu Dental Corporation | 8,918 | Hhs Breach | — |
| Apr 6, 2026 | Nephrology Associates Medical Group, Inc | 4,631 | Hhs Breach | — |
| Apr 2, 2026 | Native American Health Center | 2,451 | Hhs Breach | — |
| Apr 2, 2026 | Indian Health Center of Santa Clara Valley | 3,276 | Hhs Breach | — |
| Mar 23, 2026 | AltaMed Health Services Corporation | 501 | Hhs Breach | — |
| Mar 2, 2026 | Marin Cancer Care | 501 | Hhs Breach | — |
| Mar 2, 2026 | North East Medical Services | 91,513 | Hhs Breach | — |
| Feb 13, 2026 | Bay Area Community Health | 9,912 | Hhs Breach | — |
| Feb 12, 2026 | Personalis, Inc. | 650 | Hhs Breach | — |
| Feb 12, 2026 | Santa Cruz Community Health | 1,487 | Hhs Breach | — |
| Feb 5, 2026 | Pit River Health Service Inc. | 1,800 | Hhs Breach | — |
| Jan 30, 2026 | Cerenade | 987 | Hhs Breach | — |
| Jan 30, 2026 | Expert MRI | 209,560 | Hhs Breach | — |
| Jan 29, 2026 | Axis Community Health | 3,579 | Hhs Breach | — |
| Jan 29, 2026 | Centric Health | 6,855 | Hhs Breach | — |
| Jan 22, 2026 | Open Door Community Health Centers | 6,633 | Hhs Breach | — |
| Jan 22, 2026 | Mendocino Community Health Clinic Inc. | 3,538 | Hhs Breach | — |
| Jan 21, 2026 | Gold Coast Health Plan | 540 | Hhs Breach | — |
| Jan 21, 2026 | Friends of Family Health Center | 2,256 | Hhs Breach | — |
| Jan 21, 2026 | Jewish Family and Community Services- East Bay | 987 | Hhs Breach | — |
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Most affected entities
#1
6
incidents
4.8M
individuals
#2
2
incidents
0
individuals
#3
2
incidents
210K
individuals
#4
2
incidents
9K
individuals
#5
2
incidents
594
individuals
Attack vectors
Breakdown of breach types reported across 97 incidents in California. Understanding which vectors dominate helps practices prioritize their security controls.
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FAQ
Patient Protect tracks 97 reported healthcare data breach incidents in California, affecting approximately 11.8M 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 57 of 97 incidents. Other/Unknown is the second most common with 26 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.
Explore the full breach intelligence dashboard with 12 analytical views, risk forecasting, and attack chain visualization.
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