Stress fracture, right ulna, subs for fx w nonunion

This code signifies a stress-induced break in the right ulna bone that has failed to heal properly after initial treatment. It indicates that the patient is receiving ongoing care for this unhealed fracture, which is a complication of the original injury.

Apply this code when a patient presents for follow-up treatment, such as cast changes, physical therapy, or surgical intervention, for a stress fracture of the right ulna that has been diagnosed as a nonunion. Documentation should clearly state "stress fracture," "right ulna," "nonunion," and indicate that this is not the initial encounter for the fracture.

• Ensure documentation specifies "stress fracture" versus a traumatic fracture, as different codes apply.
• Verify laterality (right ulna) is clearly documented; separate codes exist for left or unspecified.
• Confirm the "subsequent encounter" status and the presence of "nonunion" for accurate code assignment.