Disclosure tracker › Healthcare disclosures
Intelligence · Disclosure tracker
Healthcare disclosures
Public breach disclosures from regulators, court filings, company notices and news reporting, each recorded with its date and a link to the original. Updated daily.
5,367
Disclosures in the tracker, all years
2,083
Of those, indexed in 2026
0
Added in November
22
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 1 Nov 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
5,604 results · Healthcare disclosures. Clear filters
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system breach potentially exposed patient records and personal information
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted in largest healthcare data breach of 2026; dental benefits administrator breached in May
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted, largest healthcare data breach of 2026, occurred in May
1 May 2026
Critical1 May 2026
NYC Health and Hospitals
Healthcare · 1,800,000 records
Breach exposed medical records, fingerprints, and geolocation data of 1.8M people; attackers had access 2+ months
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system experienced data breach exposing patient records and personal information
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
Cyberattack in May 2026 impacted 15 million patients, largest healthcare breach of 2026
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted; largest healthcare data breach of 2026
1 May 2026
Critical1 May 2026
NYC Health and Hospitals
Healthcare · 1,800,000 records
Breach exposed medical records, fingerprints, and geolocation data of 1.8 million people
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15M patients impacted in largest healthcare data breach of 2026; May 2026 incident
1 May 2026
Critical1 May 2026
NYC Health + Hospitals
Healthcare · 1,800,000 records
Hackers stole biometric data including fingerprints and medical data from 1.8 million people. Network access lasted over 2 months before detection.
1 May 2026
High1 May 2026
Organisation not named
Healthcare · 900,000 records
The disclosure as indexed does not name the organisation.
NHS staff inappropriately accessed medical records of Southport attack victims; breach not disclosed for nearly two years
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · Records not stated
Largest healthcare data breach of 2026 impacted 15 million dental patients
1 May 2026
Critical1 May 2026
NYC Health + Hospitals
Healthcare · 1,800,000 records
Hackers stole medical data, fingerprints and personal information affecting 1.8 million people
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system breach potentially exposed personal and medical data
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system experienced data breach potentially exposing patients' records and personal information
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted in largest healthcare data breach of 2026 in May
1 May 2026
Critical1 May 2026
NYC Health + Hospitals
Healthcare · 1,800,000 records
Hackers stole medical data, fingerprints, and personal information affecting at least 1.8 million people
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system data breach potentially exposed patient records and personal information
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients affected; largest healthcare data breach of 2026 at dental benefits administrator
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system experienced data breach, potentially exposing patients' personal information and medical records
1 May 2026
Critical1 May 2026
Conduent
Healthcare · 62,200,000 records
62.2 million records exposed, third-largest US healthcare breach ever
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patient records stolen in largest healthcare data breach of 2026 (May incident)
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted in largest healthcare breach of 2026, second-largest dental benefits administrator in U.S.
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
Second-largest dental benefits administrator breached; 15M patients impacted in largest 2026 healthcare breach
1 May 2026
Were you affected?