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.
5,299
Disclosures in the tracker, all years
2,012
Of those, indexed in 2026
58
Added in October
15
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 18 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
4,964 results · Healthcare disclosures. Clear filters
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
High1 May 2026
West Pharmaceutical Services
Healthcare · Records not stated
Ransomware attack forced systems offline globally, disrupting operations
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted in 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, breached in May
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system experienced data breach potentially exposing patient records and personal information.
1 May 2026
Critical1 May 2026
NYC Health + Hospitals
Healthcare · Records not stated
Biometrics, diagnoses, and bank details exposed via third-party vendor breach lasting months
1 May 2026
High1 May 2026
Huntsville Hospital Health System
Healthcare · Records not stated
Third-party data breach exposed patient information at Huntsville Hospital facilities
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
Largest US healthcare data breach of 2026; 15 million patients affected with SSNs and health data exposed
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · Records not stated
Dental benefits administrator breach affecting 15 million with SSNs and health data exposed
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients affected; largest 2026 US health breach exposed SSNs and dental/vision health info
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
Network breach exposed SSNs and dental/vision health records of 15 million people
1 May 2026
High1 May 2026
Atrium Health Navicent
Healthcare · Records not stated
Patient records system data breach exposing patient records and personal information
1 May 2026
Critical1 May 2026
NYC Health + Hospitals
Healthcare · 1,800,000 records
Hackers stole medical data, fingerprints and biometrics from at least 1.8 million people
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients impacted in largest healthcare breach of 2026; cyberattack occurred in May
1 May 2026
Critical1 May 2026
DentaQuest
Healthcare · 15,000,000 records
15 million patients affected; Social Security numbers and dental/vision health information exposed in May breach
1 May 2026
Critical1 May 2026
Data breach
Healthcare · Records not stated
Data breach exposed SSNs and medical records
1 May 2026
High1 May 2026
Partnered Health (Australian)
Healthcare · Records not stated
Personal information and medical details of patients at 21 clinics breached
1 May 2026
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