Stress fracture, unsp ulna and radius, init for fx

This code signifies a stress fracture affecting an unspecified bone of the forearm (either the ulna or radius) due to repetitive microtrauma, not an acute traumatic event. It indicates that the patient is receiving initial active treatment for this specific fracture.

Apply this code when documentation clearly states a stress fracture of the ulna or radius, without specifying which bone, and the patient is in the acute phase of treatment. This is appropriate for conditions like overuse injuries in athletes or individuals performing repetitive tasks, where the fracture is newly diagnosed and treatment has just begun.

• Ensure the documentation explicitly states "stress fracture" and not a traumatic fracture.
• Verify that the encounter is for the initial treatment of the fracture; subsequent encounters will require different seventh characters.
• If the specific bone (ulna or radius) is documented, a more specific code from the M84.33- subcategory should be used.