Broken internal left knee prosthesis, subsequent encounter

This code signifies a mechanical failure of an internal left knee prosthetic joint, specifically a fracture or breakage of the device components. It indicates that the patient is presenting for care related to this specific hardware failure after the initial treatment of the knee replacement.

Apply this code when a patient with a previously implanted left knee prosthesis presents with symptoms directly attributable to a confirmed fracture or breakage of the internal components. This would include follow-up visits for evaluation, imaging, or planning for revision surgery due to the broken prosthesis.

• Ensure documentation clearly specifies "broken" or "fractured" components of the internal prosthesis, not just a general malfunction.
• Confirm the encounter is "subsequent" to the initial knee replacement surgery, indicating ongoing care for the complication.
• Always code an external cause code (e.g., W00-Y34) if the cause of the breakage is known and documented.