Wedge comprsn fx fourth lum vertebra, subs for fx w nonunion

This code signifies a wedge-shaped compression fracture of the fourth lumbar vertebra that has not healed properly and is being treated in a subsequent encounter. A wedge compression fracture occurs when the front part of the vertebral body collapses, creating a wedge shape. Nonunion indicates that the bone fragments have failed to fuse after a reasonable healing period.

This code is appropriate for follow-up visits where a patient is being managed for a previously diagnosed L4 wedge compression fracture that has progressed to nonunion. This includes scenarios such as ongoing pain management, evaluation for surgical intervention (e.g., fusion), or monitoring of the nonunion site. It should be used after the initial treatment of the fracture.

• Always confirm the specific lumbar vertebra (L4) and the type of fracture (wedge compression).
• Ensure documentation clearly states "nonunion" and that this is a "subsequent encounter."
• Do not use for initial fracture treatment or for malunion, which is a different complication.