Postdysenteric arthropathy, right knee

This code describes an inflammatory joint condition affecting the right knee that develops as a reactive sequela to a previous dysenteric infection. It is a form of reactive arthritis, specifically triggered by a gastrointestinal infection, leading to sterile inflammation in the joint.

Use this code when documentation clearly indicates a diagnosis of reactive arthropathy of the right knee, with a direct causal link to a preceding dysenteric infection. The patient typically presents with acute, sterile arthritis following a diarrheal illness.

• Ensure documentation specifies "right knee" and a history of dysentery.
• Do not confuse with other forms of reactive arthritis (e.g., post-infectious arthropathy due to other pathogens) or septic arthritis.
• Code the underlying dysenteric infection (if still active or relevant) as a secondary diagnosis.