ICD-10 Code M05.569 – Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.569 – Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified knee
What it is
This code identifies rheumatoid arthritis affecting an unspecified knee, with associated polyneuropathy. Use it when the record links the neuropathy to rheumatoid disease and does not specify right or left knee.
Clinical signs
Findings may include chronic inflammatory joint pain, swelling, stiffness, and reduced knee function, along with peripheral nerve symptoms such as numbness, tingling, or weakness. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents rheumatoid arthritis in an unspecified knee and also documents rheumatoid polyneuropathy. The knee laterality is not stated, or the documentation only says “unspecified knee.” Verify that the neuropathy is part of the rheumatoid condition, not a separate disorder.
Do not use for
Do not use it for rheumatoid arthritis without neuropathy, or for neuropathy unrelated to rheumatoid disease. Do not assign it when the knee is clearly documented as right or left and a more specific code is available.
Coding tip
Check the note for both the rheumatoid neuropathy and the unspecified-knee laterality before coding.