ICD-10 Code M05.50 – Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified site (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.50 – Rheumatoid polyneuropathy with rheumatoid arthritis of unspecified site
What it is
This code identifies rheumatoid arthritis complicated by polyneuropathy, meaning multiple peripheral nerves are affected. Use it when the record links the neuropathy to rheumatoid arthritis but does not specify the joint site.
Clinical signs
Typical findings include symmetric numbness, tingling, burning pain, or weakness in more than one limb, along with documented rheumatoid arthritis. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents rheumatoid polyneuropathy and does not name a specific rheumatoid arthritis site. It also fits when the neuropathy is described as associated with rheumatoid arthritis of an unspecified site. You should code from the clinician’s stated relationship, not from suspicion alone.
Do not use for
Do not use this code for neuropathy without a documented rheumatoid arthritis link. Do not use it when the rheumatoid arthritis site is specified and a more specific code applies; check documentation.
Coding tip
Confirm both the neuropathy and the rheumatoid arthritis linkage are explicitly documented before assigning M05.50.