People search Advocate Medical Group data breach timeline because regulated data and trust are existential—one incident triggers class actions and regulator exams. BreachHistory indexes 4 Advocate Medical Group-linked incidents, with headline counts up to 4M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why Advocate Medical Group breach history matters
Advocate Medical Group operates in Healthcare. Across indexed rows, recurring themes include mixed intrusion and disclosure events. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2017 — — 4M records
Cataloged incident. Lost media. 4M records. Exposed categories include Names, emails, addresses, and other PII. BreachHistory cites approximately 40 affected records in this row. See the advocate-medical2017 and canonical BreachHistory entry.
2017 — — Advocate Medical Group: Lost / stolen device, 4,000,000 records
Cataloged incident. Data breach reported. healthcare organization. Method: lost / stolen media. Source: Wikipedia List of data breaches. Exposed categories include Personal and demographic data. BreachHistory cites approximately 4M+ affected records in this row. See the advocate-medical-group2017-4000000-wiki2 and canonical BreachHistory entry.
2013 — — Advocate Medical Group: The July 15 office theft of four unencrypted…
Cataloged incident. The July 15 office theft of four unencrypted desktop computers resulted in the exposure of patient information. Approximately four million patients who were seen by Advocate Medical Group physicians between the early 1990s and July of 2013 were affected. Names, Social Security numbers, addresses, and dates of birth were exposed. Diagnoses, medical record numbers, medical service codes, and health insurance information was also exposed in some circumstances.UPDATE (09/06/2013): A class-action l Exposed categories include Personal information. BreachHistory cites approximately 4M+ affected records in this row. See the advocate-medical-group2013 and canonical BreachHistory entry.
2013 — — Advocate Medical Group: 4,000,000 patient names, addresses, dates of birth,…
Cataloged incident. 4,000,000 patient names, addresses, dates of birth, and Social Security numbers were contained in four computers stolen from an administrative building. Second biggest security breach ever reported to the Department of Health and Human Services (HHS). BreachHistory cites approximately 4M+ affected records in this row. See the advocate-medical-groupu and canonical BreachHistory entry.
Patterns and analysis
- Mixed intrusion and disclosure events — appears across multiple Advocate Medical Group catalog entries; prioritize controls that address this class of failure.
- Record-count hygiene — BreachHistory indexes actor-cited figures separately from company-confirmed totals; read each row's technicalWriteup before treating counts as fact.
- 2026 monitoring — New disclosures roll into this timeline as they are verified or labeled unverified per catalog policy.
What to do if you may be affected
- Step 1: Enable phishing-resistant MFA on every account tied to this brand.
- Step 2: Use unique passwords and a password manager—breach rows often involve credential reuse.
- Step 3: Monitor official company breach notices and regulator filings, not dark-web downloads.
- Step 4: Watch for medical-ID theft and billing fraud after health-data incidents.
- Step 5: Bookmark the Advocate Medical Group company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/advocate-medical-group · Latest: advocate-medical2017.
Sources: BreachHistory catalog (4 rows for Advocate Medical Group), company and regulator disclosures cited in individual breach records.