Stress fx, unsp ulna and radius, subs for fx w routn heal

This code signifies a stress fracture affecting an unspecified bone of the ulna or radius that is currently undergoing routine healing. It indicates that the patient is in a follow-up phase for a previously diagnosed stress fracture, with no complications noted in the healing process.

Apply this code for follow-up visits where a patient is being monitored for a stress fracture of the forearm (ulna or radius) that is healing as expected. Documentation should confirm the diagnosis of a stress fracture, specify the forearm as the affected area, and indicate routine healing without mention of delayed union, nonunion, or malunion.

• Ensure documentation explicitly states "stress fracture" and not a traumatic fracture, as these have different coding pathways.
• Confirm the encounter is "subsequent" and for "routine healing" to differentiate from initial encounters or encounters for complicated healing.
• If the specific bone (ulna or radius) is documented, use the more specific M84.33- code (e.g., M84.331D for right ulna) instead of the unspecified code.