Idaho Subscriber
Answer: You should first report V58.0 (Encounter for other and unspecified procedures and aftercare; radiotherapy), followed by an appropriate neoplasm code, such as 161.1 (Malignant neoplasm of larynx; supraglottis).
Why: Although official guidelines typically require you to report the diagnosis responsible for the service first, if the patient receives only chemotherapy, radiation therapy, or rehabilitation, you should report the appropriate V code for the service as the primary diagnosis.
Caution: Individual payer guidelines may vary from the official guidelines, so determine your payer's rules and abide by them.