UCLA Health
Disclosed Jul 17, 201511 years ago4,500,000 affectedConfirmed
Hackers access UCLA Health network holding data of 4.5 million patients
A hacker accessed parts of UCLA Health's network containing clinical and demographic information of about 4.5 million people. UCLA Health reported it to the FBI, ran a forensic review and notified patients.
What is known
| People affected | 4,500,000 (as reported by the organization) |
|---|---|
| Disclosed | Jul 17, 2015 |
| Happened | Sep 21, 2014 |
| Attack | Hacking |
| Data exposed | Names, Health, Other, Social Security numbers |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: UCLA Healthoag.ca.gov · Official notice | Official notice |
| HHS Office for Civil Rights breach portal (archive): Breaches Affecting 500 or More Individualsocrportal.hhs.gov · Regulator | Regulator |
| Indiana Attorney General 2015 data breach report: UCLA Healthin.gov · Official notice | Official notice |
| Maine Attorney General breach notice archive: UCLA Healthmaine.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| California AGresidents of CA | Jul 17, 2015 | |
| Researchtotal | Jul 17, 2015 | 4,500,000 |
| Indiana AGresidents of IN | Jul 17, 2015 | 1,677 |
| Maine AGresidents of ME | Jul 17, 2015 | 423 |
Other breaches at UCLA Health
| Breach | Affected | ||||
|---|---|---|---|---|---|
| Disclosed Aug 4, 2026Aug 47 weeks ago | Aug 47 weeks ago | Not stated | Healthcare | Confirmed | Unknown |
| Disclosed Sep 8, 2022Sep 8, 20224 years agoInsider | Sep 8, 20224 years ago | Insider | Healthcare | Confirmed | 94K |
History of this record
- 2026-09-25 · data_types: ["names","health","other"] to ["names","health","other","ssn"] · backfill source
- 2026-09-25 · source: empty to https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/files/DB-Year-to-date-Report-2015.pdf · backfill source
- 2026-09-25 · attack: unknown to hacking · seed source
- 2026-09-25 · data_types: [] to ["names","health","other"] · seed source
- 2026-09-25 · records_basis: empty to organization · seed source
- 2026-09-25 · records: empty to 4500000 · seed source
- 2026-09-25 · summary: empty to A hacker accessed parts of UCLA Health's network containing clinical and demographic information of about 4.5 million people. UCLA Health reported it to the FBI, ran a forensic review and notified patients. · seed source
- 2026-09-25 · title: empty to Hackers access UCLA Health network holding data of 4.5 million patients · seed source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.