Other reactive arthropathies, left knee

This code signifies an inflammatory joint condition affecting the left knee that arises as a reaction to an infection elsewhere in the body, rather than from direct joint infection. It encompasses various forms of reactive arthritis not specifically classified elsewhere, characterized by sterile synovitis.

Apply this code when documentation specifies reactive arthropathy impacting the left knee, without a more specific ICD-10-CM code available for the particular type. Supporting documentation should clearly indicate a diagnosis of reactive arthritis and laterality of the knee involvement.

• Ensure documentation specifies "left knee" to avoid laterality errors.
• Do not use this code for infectious arthritis, which involves direct infection of the joint.
• Code the underlying infection separately, if known and still active.