Stress fracture, right ankle, subs for fx w nonunion

This code signifies a stress fracture affecting the right ankle that has failed to heal properly, indicating a nonunion. The patient is receiving active treatment for this nonunion, such as surgical intervention or ongoing medical management. This represents a complication of the initial stress fracture.

Apply this code when documentation clearly states a stress fracture of the right ankle with a confirmed nonunion, and the patient is in a subsequent phase of care for this specific complication. This is appropriate for encounters where the focus is on treating the established nonunion, not the initial injury. Documentation should specify "nonunion" and "right ankle."

• Ensure documentation explicitly states "nonunion" and the specific anatomical site (right ankle) for accurate code assignment.
• Distinguish between delayed union and nonunion; this code is specific to nonunion.
• This "K" seventh character indicates a subsequent encounter for a nonunion, meaning the patient is receiving active treatment for the nonunion. Do not use for initial treatment or sequelae.