FACTBOX-Biggest cyber attacks in US healthcare sector

Reuters05-02

(Updates with details from congressional committee meeting in paragraph 1)

May 2 (Reuters) - The hack at UnitedHealth Group's

tech unit potentially compromised a third of Americans' data, including U.S. military members' data, the largest U.S. health insurer's CEO told a Congressional committee in May.

The exact impact of the Feb. 21 hack on patient data is not yet clear, but the breach adds to a growing list of increasingly disruptive cyber attacks on U.S. healthcare companies.

The following is a list of the biggest IT hacks in the sector where patient data was breached:

Type of

Name of Year Individuals company

company affected

Anthem Inc 2015 78,800,000 Health insurer

American 2019 26,059,725 Medical debt

Medical collector

Collection

Agency

HCA 2023 11,270,000 Hospital operator

Healthcare

Premera Blue 2015 11,000,000 Health insurer

Cross

Excellus 2015 9,358,891 Health insurer

Health Plan,

Inc

Perry 2023 8,952,212 Medical transcription

Johnson & service provider

Associates

(PJ&A)

Managed Care 2023 8,861,076 Dental insurer

of North

America

(MCNA

Dental)

Welltok Inc 2023 8,493,379 Healthcare technology

provider

PharMerica 2023 5,815,591 Healthcare provider

Corp

Source: Government data, company reports

(Reporting by Sneha S K and Mariam Sunny in Bengaluru)

((Sneha.SK@thomsonreuters.com;))

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