Instability of internal left knee prosthesis, sequela

This code signifies a long-term complication where a previously implanted prosthetic device in the left knee has become unstable. This instability can manifest as loosening, subluxation, or dislocation of the prosthetic components, occurring after the initial healing phase of the knee replacement surgery.

Apply this code when documenting a patient presenting with ongoing symptoms related to a left knee prosthesis that has lost its proper alignment or fixation, and the encounter is for the sequelae of this instability. This would include follow-up visits for chronic pain, limited range of motion, or functional impairment directly attributable to the prosthetic instability.

• Requires a seventh character "S" for sequela, indicating a late effect of the instability.
• Always sequence this code after the primary diagnosis describing the specific manifestation of the instability (e.g., pain, mechanical complication).
• Ensure documentation clearly specifies "left" knee and the chronic nature of the instability.