Since the dinosaurs roamed the earth (OK, since 1983), coding professionals have been tasked with ensuring that bills for Medicare patients included the proper elements of the diagnosis-related group (DRG) system so that the hospital got as much money as possible from Medicare.
The root operation identifies the intent of the procedure. It is identified in the third character of the ICD-10-PCS code. ICD-10-PCS guideline A.11 states that the coder is responsible for selecting the root operation that most closely matches the intent of the procedure.
The AHA's Coding Clinic for ICD-10-CM/PCS, Third Quarter 2015, opens with a discussion of the differences between excisional and non-excisional debridement‑diagnoses with a long history of coding and clinical documentation confusion.
