Reiter's disease, left hip

This code signifies reactive arthritis, also known as Reiter's syndrome, specifically affecting the left hip joint. Reactive arthritis is an autoimmune condition triggered by an infection elsewhere in the body, leading to inflammation of the joints, eyes, and genitourinary tract.

Apply this code when documentation clearly indicates a diagnosis of Reiter's disease with inflammatory arthropathy localized to the left hip. Supporting documentation should include physician notes detailing the diagnosis, affected joint, and clinical findings consistent with reactive arthritis.

• Ensure documentation specifies "left hip" to accurately assign this laterality-specific code.
• Do not confuse with other forms of inflammatory arthropathy; confirm the diagnosis of Reiter's disease.
• Code any underlying infection that triggered the reactive arthritis, if known and still active, as an additional diagnosis.