Reiter's disease, right hand

This code signifies a diagnosis of Reiter's disease, also known as reactive arthritis, specifically affecting the right hand. Reactive arthritis is an autoimmune condition triggered by an infection elsewhere in the body, characterized by inflammatory arthritis, urethritis, and conjunctivitis. This particular code specifies the anatomical location of the arthritic manifestation.

Use this code when documentation clearly indicates a diagnosis of Reiter's disease with inflammatory involvement of the right hand. This typically occurs following a genitourinary or gastrointestinal infection. Supporting documentation should include physician notes detailing the diagnosis, symptoms in the right hand (e.g., pain, swelling, tenderness), and possibly a history of a preceding infection.

• Ensure the documentation explicitly states "Reiter's disease" or "reactive arthritis" and specifies the right hand.
• Do not use this code for other forms of inflammatory arthritis affecting the hand without a confirmed diagnosis of Reiter's disease.
• Code the underlying infection (if identified and still active) as an additional diagnosis, following sequencing guidelines.