In simple words: This code means the patient went to the doctor or hospital for cancer treatment using radiation therapy.This might be a single treatment or part of a series of treatments.

This code signifies an encounter for antineoplastic radiation therapy.It's used when a patient receives radiation therapy as part of cancer treatment.The code indicates the reason for the encounter and is used in conjunction with a procedure code if a specific procedure was performed during the visit.

Example 1: A patient with newly diagnosed lung cancer presents for their first fraction of external beam radiation therapy to the lung., A patient with breast cancer who has completed chemotherapy is receiving adjuvant radiation therapy to the chest wall. This is a follow-up visit for the second fraction of a planned course of radiation therapy., A patient with recurrent prostate cancer undergoes brachytherapy (internal radiation therapy) as part of their treatment plan. This is the patient's first visit to implant the radioactive seeds.

* Diagnosis of cancer requiring radiation therapy.* Treatment plan outlining the type, dose, and schedule of radiation therapy.* Documentation of the specific radiation therapy delivered (e.g., external beam radiation therapy, brachytherapy, stereotactic body radiation therapy).* Date(s) of service for each radiation treatment fraction.

** This code should only be used for encounters where the primary reason for the visit is to receive antineoplastic radiation therapy.It should not be used for routine follow-up appointments unless a specific procedure related to radiation therapy is also performed.