Puncture wound with foreign body, right knee, sequela

This code describes a puncture wound to the right knee that has resulted in a foreign body remaining in the tissue, and the patient is now presenting for treatment of a long-term complication or residual effect of that injury. This indicates that the initial acute injury has passed, and the current encounter addresses a condition stemming from the original trauma and retained foreign object.

Apply this code when a patient presents with a chronic issue, such as persistent pain, infection, restricted range of motion, or nerve damage, directly attributable to a foreign body embedded in the right knee from a prior puncture wound. This is appropriate for follow-up encounters addressing the lasting impact of the injury, not the initial acute treatment.

• Ensure documentation clearly links the current condition to the retained foreign body from the past puncture wound.
• This "S" seventh character indicates a sequela, meaning the patient is being seen for a complication or residual effect of the original injury, not the initial treatment.
• Do not use this code for the initial encounter of the puncture wound or for acute treatment of the foreign body.