Arthritis due to Lyme disease

This code signifies inflammatory joint disease directly resulting from an infection with Borrelia burgdorferi, the bacterium responsible for Lyme disease. It typically presents as oligoarticular or monoarticular arthritis, often affecting large joints like the knee, and can occur weeks to months after the initial tick bite.

Use this code when documentation clearly indicates a diagnosis of arthritis confirmed to be a sequela of Lyme disease. This diagnosis is typically supported by a history of Lyme infection, positive serological tests for Borrelia burgdorferi, and clinical presentation consistent with Lyme arthritis, often after other causes of arthritis have been ruled out.

• Ensure documentation specifies "arthritis due to Lyme disease" and not just "Lyme disease" or "arthritis."
• Do not confuse with other forms of infectious arthritis or non-Lyme related inflammatory arthropathies.
• Consider sequencing this code after the initial Lyme disease code (A69.20) if the arthritis is a current manifestation of a previously diagnosed infection.