Unstbl burst fx first lum vertebra, subs for fx w delay heal

This code signifies an unstable burst fracture of the first lumbar vertebra that is currently in the healing phase, but the healing process is progressing slower than expected. An unstable burst fracture involves significant vertebral body damage with potential for spinal canal compromise, and delayed healing indicates a prolonged recovery period.

Use this code for patients presenting for follow-up care of an L1 unstable burst fracture where the fracture has not yet fully united and the physician documents delayed healing. This applies to encounters after the initial treatment of the acute fracture.

• Requires documentation of "unstable burst fracture" and "delayed healing" for the L1 vertebra.
• Distinguish from routine follow-up (without delayed healing) or nonunion.
• Always sequence after the primary reason for the encounter if applicable.