Lateral dislocation of left patella, initial encounter

This diagnosis code signifies a displacement of the kneecap (patella) from its normal position, specifically shifting towards the outer side of the left knee. This condition typically results in acute pain, swelling, and an inability to fully extend or bear weight on the affected leg.

Apply this code for a patient presenting with a newly diagnosed lateral dislocation of their left patella. This includes initial evaluations in the emergency department, urgent care, or a physician's office following the injury. It is appropriate for the first encounter related to this specific dislocation.

• Ensure documentation clearly specifies "lateral" displacement and "left" knee.
• The "A" seventh character indicates an initial encounter for active treatment of the injury.
• Do not use this code for recurrent dislocations or follow-up care after the initial treatment phase.