ICD-10 Code M05.562 – Rheumatoid polyneuropathy with rheumatoid arthritis of left knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.562 – Rheumatoid polyneuropathy with rheumatoid arthritis of left knee
What it is
This code identifies rheumatoid arthritis affecting the left knee, with associated polyneuropathy. Use it when the record links both the inflammatory joint disease and the nerve disorder to the same rheumatoid condition.
Clinical signs
Expect documented rheumatoid arthritis findings in the left knee, such as inflammatory pain, swelling, stiffness, or reduced motion. Polyneuropathy may be noted as generalized peripheral nerve involvement; clinical features vary, so refer to documentation.
When to use this code
Use this code when the provider clearly documents rheumatoid polyneuropathy and specifies rheumatoid arthritis in the left knee. It is appropriate when the neuropathy is part of the rheumatoid disease process, not a separate unrelated nerve disorder.
Check documentation for laterality and the exact rheumatoid diagnosis. If the knee involvement or neuropathy is not clearly linked, code the documented conditions separately only when supported.
Do not use for
Do not use this code for rheumatoid arthritis without neuropathy, or for neuropathy that is unrelated to rheumatoid disease. Do not assume left knee involvement unless it is explicitly documented.
Coding tip
Verify both the rheumatoid polyneuropathy and left-knee laterality in the provider note before assigning M05.562.