Mevion Medical Systems

Medical Equipment ManufacturingMassachusetts, United States201-500 Employees

Mevion Medical Systems is a private medical equipment manufacturer focused on proton therapy systems for cancer treatment. It is based in Littleton, Massachusetts, with international offices in the United Kingdom and Japan and a joint venture in China, serving a global market with mid-sized operations. The company emphasizes compact, high-uptime systems intended to simplify operations and reduce capital and operating costs for cancer centers, with its MEVION S250 Series described as a flagship family designed to deliver stable and efficient proton therapy across facilities of varying sizes. This lineup is aimed at improving beam quality, stability, and throughput while enabling scalable configurations for multi-room installations.

Its primary customers are cancer centers and health systems seeking advanced radiation therapy options. In 2026, Mevion announced a contract with UNC Health Alliance, part of broader engagement with nine leading institutions worldwide, including Stanford Health Care and Loma Linda University Health, to deploy the S250-FIT system. The company operates within the medical device sector and pursues partnerships and integrations to support its installations and expand its clinical footprint.

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