Unspecified superficial injury of unspecified knee, sequela

This code indicates a superficial injury to the knee, such as a contusion, abrasion, or blister, where the specific nature of the injury is not documented. The "sequela" seventh character signifies that this injury is a late effect or complication of an earlier injury or condition.

Apply this code when documentation clearly states a superficial knee injury without further specification, and it is being treated as a long-term consequence of a previous event. This is appropriate for follow-up care or when the initial injury's acute phase has passed, and residual effects are being addressed.

• Only use the "S" seventh character for sequelae when the acute phase of the injury has concluded.
• Avoid this code if a more specific superficial knee injury (e.g., abrasion, contusion) is documented.
• Ensure documentation supports both the superficial nature of the injury and its status as a sequela.