Reiter's disease, unspecified ankle and foot

This code signifies an inflammatory arthropathy affecting the ankle and/or foot, characteristic of Reiter's syndrome (now more commonly referred to as reactive arthritis), where the specific joint involved in the ankle or foot is not documented. Reiter's disease is a seronegative spondyloarthropathy often triggered by an infection, presenting with arthritis, urethritis, and conjunctivitis.

Apply this code when documentation confirms a diagnosis of Reiter's disease with involvement of the ankle and/or foot, but the medical record does not specify whether it's the right, left, or bilateral ankle/foot. This code is appropriate when the provider explicitly states "Reiter's disease, unspecified ankle and foot" or similar language indicating the joint involvement without laterality.

• Ensure the documentation clearly links the ankle/foot involvement to Reiter's disease.
• Avoid using this code if laterality (right, left, or bilateral) of the ankle/foot involvement is specified; instead, use a more specific code.
• Consider sequencing this code after codes for any underlying infectious triggers, if documented and still active.