Nondisp seg fx shaft of ulna, unsp arm, 7thK

This code signifies a fracture involving a segment of the ulna's shaft that has not shifted from its normal alignment. The patient is in a follow-up phase of treatment, and the fracture has failed to heal properly without surgical intervention. This indicates a persistent gap or lack of bone bridging at the fracture site.

Apply this code for subsequent encounters when a patient with a previously diagnosed nondisplaced segmental ulnar shaft fracture, managed non-surgically, is found to have nonunion. This typically occurs during follow-up appointments where imaging confirms the lack of healing. It is used when the patient is still receiving active treatment for the nonunion.

• Ensure documentation clearly states "nondisplaced," "segmental," and "shaft of ulna" for accurate selection.
• The "K" seventh character indicates a subsequent encounter for a closed fracture with nonunion, meaning the patient is still under active treatment for the nonunion.
• Verify that the fracture was initially treated non-surgically (closed treatment) to align with this code.