Other specified rheumatoid arthritis, left knee

This code signifies a diagnosis of rheumatoid arthritis that doesn't fit into more specific categories, affecting the left knee. It indicates an inflammatory autoimmune condition primarily impacting the synovial lining of the joint, leading to pain, swelling, and potential joint damage. The "other specified" designation implies the provider has identified characteristics of rheumatoid arthritis that are not fully captured by other, more defined sub-types.

Use this code when documentation clearly states "other specified rheumatoid arthritis" and explicitly identifies the left knee as the affected joint. This code is appropriate when the physician has ruled out or not specified other common forms of RA (e.g., seropositive, seronegative, with organ involvement) but has confirmed the diagnosis of RA in the left knee. Supporting documentation would include physician notes detailing the diagnosis and the specific joint involvement.

• Ensure the documentation specifies "other specified" rheumatoid arthritis, not just general rheumatoid arthritis, and clearly identifies the left knee.
• Do not use this code if the documentation indicates a more specific type of rheumatoid arthritis (e.g., seropositive, seronegative); choose the appropriate code for that specific type.
• Always sequence this code after any underlying systemic conditions or manifestations of rheumatoid arthritis, if applicable.