ICD-10 Code M05.539 – Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified wrist (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.539 – Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified wrist
What it is
This code identifies rheumatoid arthritis affecting an unspecified wrist, along with rheumatoid polyneuropathy. Use it when the record links the joint disease and nerve involvement to rheumatoid arthritis.
Clinical signs
Findings may include chronic inflammatory wrist pain, stiffness, swelling, and symptoms of peripheral neuropathy 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 wrist and also documents rheumatoid polyneuropathy. It is appropriate when the wrist laterality is not specified in the chart. Do not assume laterality from exam notes alone.
Do not use for
Do not use it for rheumatoid arthritis without nerve involvement, or for neuropathy not described as rheumatoid. If the wrist side is documented, choose the more specific code instead. Check documentation.
Coding tip
Confirm both the rheumatoid arthritis diagnosis and the neuropathy link before assigning M05.539.