Medicare Data Breach 2024. In early 2024, the u.s. — after change healthcare, a technology company owned by unitedhealth group, reported a giant ransomware attack, you may have received a letter by mail.
— hms handles cms data as part of processing medicare eligibility and entitlement records, in addition to premium payments. — the centers for medicare & medicaid services (cms) is continuing to monitor and assess the impact that the cyberattack on unitedhealth group’s subsidiary.