Reiter's disease, left wrist

This code signifies reactive arthritis (formerly Reiter's syndrome) affecting the left wrist. Reactive arthritis is an autoimmune condition triggered by an infection elsewhere in the body, leading to inflammatory joint pain, often accompanied by urethritis, conjunctivitis, and skin lesions.

Apply this code when documentation explicitly states a diagnosis of Reiter's disease or reactive arthritis specifically impacting the left wrist. This diagnosis is typically supported by a history of recent infection, characteristic clinical findings, and imaging or laboratory results confirming inflammatory arthritis.

• Ensure documentation specifies "Reiter's disease" or "reactive arthritis" and clearly identifies the left wrist as the affected joint.
• Do not confuse with other forms of inflammatory arthritis, such as rheumatoid arthritis or psoriatic arthritis, unless specifically documented as such.
• Code any underlying infection that triggered the reactive arthritis, if known and still active, in addition to this code.