Stress fx, unsp ulna and radius, subs for fx w malunion

This code signifies a stress fracture affecting an unspecified bone of the forearm (ulna or radius) that has healed incorrectly, resulting in a malunion. This specific encounter is for follow-up care related to this previously diagnosed and treated, but poorly healed, fracture.

Use this code when a patient presents for ongoing management of a stress fracture of the ulna or radius that has developed a malunion. Documentation should clearly indicate a stress fracture, evidence of malunion (e.g., angular deformity, rotational deformity), and that the encounter is subsequent to the initial treatment.

• Ensure documentation specifies "stress fracture" and "malunion" for the ulna or radius.
• Verify the encounter type is "subsequent" and not initial or sequela.
• Do not use this code for nonunion; a different code exists for that complication.