Lateral subluxation of left patella, initial encounter

This diagnosis code indicates an incomplete dislocation of the kneecap, specifically where the left patella has shifted laterally (outward) from its normal position within the trochlear groove. The "initial encounter" signifies that the patient is receiving active treatment for this specific injury.

Use this code for a patient presenting with a newly diagnosed or acutely treated lateral subluxation of the left patella. This would include scenarios such as an emergency department visit for a recent injury, or the initial orthopedic consultation following such an event.

• Ensure documentation specifies "left" patella and "lateral" subluxation.
• Confirm the encounter is for active treatment of the injury, not follow-up care or sequelae.
• Distinguish from complete dislocations (luxations) and other types of patellar instability.