Unstbl burst fx fourth lum vert, subs for fx w delay heal

This code signifies an unstable burst fracture affecting the fourth lumbar vertebra, indicating a severe injury where the vertebral body is crushed in multiple directions. The "unstable" nature implies a high risk of spinal cord or nerve root compression, and "delayed healing" means the fracture is not progressing to union within the expected timeframe.

This code is appropriate for subsequent encounters with a patient who has previously been diagnosed and treated for an unstable burst fracture of the L4 vertebra. It specifically applies when the physician documents that the fracture is experiencing delayed healing, requiring ongoing management or intervention.

• Ensure documentation clearly specifies "unstable burst fracture" of the L4 vertebra and "delayed healing."
• This code is for subsequent encounters; an initial encounter would use a different seventh character.
• Always review the entire medical record for details on fracture stability and healing status.