ICD-10 Code M05.571 – Rheumatoid polyneuropathy with rheumatoid arthritis of right ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.571 – Rheumatoid polyneuropathy with rheumatoid arthritis of right ankle and foot
What it is
This code identifies rheumatoid arthritis affecting the right ankle and foot, with associated rheumatoid polyneuropathy. Use it when documentation shows both the inflammatory joint disease and nerve involvement in that same limb.
Clinical signs
Findings may include chronic inflammatory joint pain, swelling, stiffness, and reduced motion in the right ankle or foot, plus neuropathic symptoms such as numbness, tingling, or weakness. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record specifically links rheumatoid polyneuropathy to rheumatoid arthritis and localizes the arthritis to the right ankle and foot. It is appropriate for provider-documented combined joint and nerve involvement, not for nonspecific limb pain alone.
If laterality is documented as right and the diagnosis is confirmed, this code captures the full condition. Check documentation when neuropathy is mentioned without a clear rheumatoid connection or when the affected joint site is not specified.
Do not use for
Do not use this code for rheumatoid arthritis without neuropathy, neuropathy without rheumatoid arthritis, or disease in the left or unspecified ankle and foot. Check documentation if the site or laterality is unclear.
Coding tip
Verify that both the rheumatoid arthritis and polyneuropathy are documented together, with right ankle and foot laterality clearly stated.