Superficial foreign body, right knee, subsequent encounter

This code indicates a superficial foreign body embedded in the right knee, such as a splinter or small piece of glass, that is being addressed during a follow-up visit. The foreign body is located in the skin or subcutaneous tissue, not within the joint capsule or deeper structures.

Use this code for a patient returning for re-evaluation, dressing change, or further management of a previously identified superficial foreign body in the right knee. This applies when the initial encounter for the foreign body has already been coded. It is appropriate for situations where the foreign body has not yet been fully removed or the wound is still healing.

• Ensure the encounter is truly "subsequent" and not the initial presentation for the foreign body.
• Verify the foreign body's location is specifically the right knee and superficial.
• Pair with an external cause code (V00-Y99) to describe the circumstances of the injury.