Oth fx fourth lum vertebra, subs for fx w delay heal

This code signifies a fracture of the fourth lumbar vertebra, excluding a compression fracture, that is currently undergoing treatment but is healing slower than expected. It indicates that the patient is in a subsequent phase of care for this specific injury, and the healing process is prolonged.

This code is appropriate for follow-up encounters where a patient with a previously diagnosed and treated non-compression fracture of the L4 vertebra is presenting with evidence of delayed union or nonunion. It would be used when the physician documents that the fracture is not healing at the anticipated rate, requiring continued management.

• Ensure documentation explicitly states "delayed healing" or similar terminology for the L4 fracture.
• Verify that the encounter is for follow-up care, not the initial treatment of the fracture.
• Confirm the fracture is of the fourth lumbar vertebra and is not specified as a compression fracture.