Lateral subluxation of left patella, sequela

This code indicates a long-term consequence or late effect of a previous lateral subluxation of the left kneecap. It signifies that the left patella has partially dislocated sideways and that the patient is now experiencing residual symptoms or complications from that past injury, rather than an acute event.

This code is appropriate when documenting chronic pain, instability, limited range of motion, or other persistent issues in the left knee directly attributable to a prior lateral patellar subluxation. It should be used for follow-up encounters after the initial injury has healed, but its effects continue to impact the patient.

• Always assign a "sequela" code (7th character S) when the patient is being treated for the residual effects of an old injury.
• Do not use this code for an acute or initial lateral patellar subluxation; separate codes exist for acute injuries.
• Consider co-reporting with codes for associated conditions or symptoms, such as chronic pain (e.g., G89.29) if applicable.