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Official Description

Radiation treatment delivery, single treatment area, single port or parallel opposed ports, simple blocks or no blocks; 6-10 MeV

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 77403 refers to the delivery of radiation treatment specifically designed for a single treatment area using either a single port or parallel opposed ports. This procedure employs simple blocks or may not utilize any blocks at all. The radiation beam utilized in this treatment ranges from 6 to 10 megavolts (MeV), which is a measure of the energy of the radiation being delivered. The primary objective of this procedure is to direct high-energy radiation towards a tumor or cancerous tissue in an effort to destroy it or inhibit its growth. The use of a single treatment area indicates that the focus is on a specific localized region, allowing for targeted therapy that minimizes exposure to surrounding healthy tissues. It is important to note that different codes are designated for varying energy levels of radiation; for instance, a lower energy beam of 5 megavolts or less would not be coded under 77403, while higher energy beams of 11-19 megavolts and 20 megavolts or higher would be coded under 77404 and 77406, respectively. This structured approach to coding ensures accurate representation of the treatment provided and facilitates appropriate billing and reimbursement processes.

© Copyright 2026 Coding Ahead. All rights reserved.

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