Brkdwn other nervous sys device, implant or graft, subs

This code indicates a mechanical failure or malfunction of a previously implanted or grafted device within the nervous system, such as a vagus nerve stimulator, spinal cord stimulator, or deep brain stimulator. The breakdown is due to a mechanical issue, not an infection or displacement, and the patient is receiving follow-up care for this complication.

Use this code when a patient presents for evaluation or management of a mechanical breakdown of a nervous system implant, and this is not the initial encounter for the complication. Examples include a fractured lead, battery failure, or pump malfunction of a neurostimulator. This code is appropriate for subsequent visits related to the same mechanical issue.

• Ensure the documentation clearly states a mechanical breakdown and not another type of complication (e.g., infection, displacement).
• Confirm this is a subsequent encounter for the complication, indicated by the "D" seventh character.
• Always code the underlying condition for which the device was implanted as a secondary diagnosis.