CPT® 77300, Under Medical Radiation Physics, Dosimetry, Treatment Devices, and Special Services for Radiation Treatment

The Current Procedural Terminology (CPT®) code 77300 as maintained by American Medical Association, is a medical procedural code under the range - Medical Radiation Physics, Dosimetry, Treatment Devices, and Special Services for Radiation Treatment.

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Summary

Radiation therapy is one of the most effective treatment methods for cancerous tumors. Due to its negative side effects like damage to the healthy cells, radiation therapy involves thorough planning of the dosage, the method, and the duration of the treatment. Dosimetry refers to the calculation of radiation dose (the amount and duration of radiation energy) that a patient needs for the successful treatment of the malignancy. The dose is measured in units of "grays" (Gy) and the number of Gy units a patient needs depends upon the type and stage of cancer being treated. Some of the factors that need calculation and planning for radiotherapy include the central axis depth dose, nominal standard dose (NSD), time dose factor (TDF), gap calculation, off axis factor, tissue inhomogeneity factor, and non–ionizing radiation surface and depth dose. Based on the outcome of the treatment, the physician can modify the dosage through subsequent dosimetries.

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