Medical Computer Business Services

Medical Computer Business Services, also known by the alias MCBS, is headquartered in the United States of America. The organization provides computer business services to the medical sector, focusing on technology solutions for healthcare providers. Its name reflects a specialization in supporting medical institutions with IT infrastructure and related services. As a provider in this niche, MCBS operates within the broader health‑information technology market.

In September 2025, MCBS experienced a data breach that occurred between September 22 and September 26. Hackers accessed the organization’s systems and potentially exfiltrated personal data belonging to over 1.2 million individuals. The PEAR ransomware group publicly claimed responsibility for the incident. This event highlights the volume of sensitive information that MCBS manages as part of its service offerings.

The breach underscores the organization’s role in handling personal data for its clients. While no further details about ownership or parent‑company relationships are provided in the available sources, the incident positions MCBS as a notable target for cyber‑threat actors focusing on medical‑sector IT providers. The event also illustrates the regulatory environment that such U.S.–based health‑IT firms must navigate.