Stress fracture, left radius, subs for fx w nonunion

This code signifies a stress fracture of the left radius that has failed to heal properly, indicating a nonunion. The patient is receiving active treatment for this nonunion, such as surgical intervention, cast changes, or medication adjustments.

Apply this code when documentation clearly states a stress fracture of the left radius with evidence of nonunion, and the patient is undergoing ongoing treatment for this specific complication. This includes follow-up visits for management of the nonunion, not just routine follow-up after initial treatment.

• Ensure documentation specifies "stress fracture" and "nonunion" of the left radius.
• Distinguish from initial encounter (A), subsequent encounter for routine healing (D), or sequela (S) codes.
• Always sequence this code after any underlying cause of the stress fracture, if applicable and documented.