Reiter's disease, right shoulder

This code identifies Reiter's disease, also known as reactive arthritis, specifically affecting the right shoulder. Reiter's disease is an autoimmune condition triggered by an infection, characterized by a triad of arthritis, urethritis, and conjunctivitis, though not all symptoms may be present. The arthritis component involves inflammation of joints, in this case, localized to the right shoulder.

Use this code when documentation confirms a diagnosis of Reiter's disease with inflammatory arthropathy of the right shoulder. This typically occurs following a genitourinary or gastrointestinal infection. Supporting documentation should include physician's notes detailing the diagnosis, affected joint, and any associated symptoms.

• Ensure the documentation explicitly states "Reiter's disease" or "reactive arthritis" and specifies the right shoulder as the affected joint.
• Do not confuse with other forms of inflammatory arthritis if the etiology is not reactive arthritis.
• Code any underlying infection that triggered the reactive arthritis as an additional diagnosis, if known and still active.