Final answer:
The operative episode involving excision of a pancreatic malignancy followed by intraoperative radiation therapy is coded using highly specific ICD-10-PCS codes that reflect the surgical and therapeutic procedures performed.
Step-by-step explanation:
The correct way to code this operative episode for excision of a malignancy of the pancreas followed by intraoperative radiation therapy would be using specific codes that represent the surgical excision and the intraoperative radiation. In medical coding, especially in the context of ICD-10-PCS (International Classification of Diseases, 10th Revision, Procedure Classification System), codes are meticulously assigned to accurately represent the procedures performed. The codes indicate not only the type of procedure but also the specific body part, approach, and any additional treatments or devices used.