Final answer:
Character 6 in the Radiation Therapy Section of ICD-10-PCS denotes the method of radiation therapy treatment. It represents the approach used in delivering the radiation therapy, which can be external or internal.
Step-by-step explanation:
The character 6 in the Radiation Therapy Section of ICD-10-PCS denotes the method of the radiation therapy treatment. In ICD-10-PCS, character 6 represents the approach used in delivering the radiation therapy, which could be external or internal. External beam radiation therapy is delivered by a machine outside the body, while internal radiation therapy (brachytherapy) involves the use of a radioactive substance that is introduced into the body. The choice of approach depends on several factors, including the type and location of the cancer.