Unstable burst fx fifth lum vertebra, subs for fx w nonunion

This code signifies an unstable burst fracture of the fifth lumbar vertebra that has not healed properly, indicating a nonunion. The patient is in a subsequent phase of care for this specific fracture, meaning the initial treatment has already occurred.

Use this code for follow-up encounters where a patient with a previously diagnosed unstable burst fracture of the L5 vertebra is being treated for a confirmed nonunion. This applies when the fracture fragments have failed to unite after an appropriate healing period, requiring further intervention or management.

• Ensure documentation clearly states "unstable burst fracture" and "fifth lumbar vertebra."
• Confirm the encounter is for follow-up care of the nonunion, not initial treatment or routine healing.
• Verify the nonunion diagnosis is explicitly documented by the provider.