What is the appropriate report code for a malunion of a pathological fracture in the right ankle?

The appropriate report code for a malunion of a pathological fracture in the right ankle is M84.471P. This code specifically denotes a pathological fracture that has not healed properly or has healed in an incorrect position, which defines a malunion. The "471" part of the code indicates the malunion is located in the right ankle. The "P" at the end signifies that this fracture occurred in the context of a preexisting disease or condition that made the bone more susceptible to fracturing, distinguishing it from typical fractures that do not involve a pathology.

Understanding the structure of the code is crucial. The first segment (M84) generally categorizes the type of condition, while the following digits specify the location and details about the fracture, and the suffix indicates whether it is related to pathology or has additional specified features. Thus, correctly identifying the components of the code helps ensure comprehensive and accurate clinical documentation.