US Healthcare Diagnostic Firm Says 140,000 Affected by Data Breach

Nearly 140,000 people are affected by a data breach disclosed by healthcare diagnostic company Vikor Scientific.

The number of affected individuals came to light in recent days on the healthcare data breach tracker maintained by the US Department of Health and Human Services (HHS).

However, the narrative is not straightforward.

HHS’s tracker lists the South Carolina-based molecular diagnostics company Vikor Scientific (recently rebranded as Vanta Diagnostics) as the victim of a data breach that compromised the information of 139,964 individuals.

The incident came to light in November 2025, when the Everest ransomware group listed Vikor Scientific, along with affiliated diagnostic laboratory companies KorPath and Korgene, on its leak website. The cybercriminals later published data allegedly stolen from the companies.

However, the cybercriminals did not target Vikor and its affiliates directly. The data breach appears to stem from Catalyst RCM, a provider of revenue cycle management solutions.

Catalyst ...