ICD-10 Code G61 – Inflammatory Polyneuropathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G61 – Inflammatory polyneuropathy
What it is
G61 identifies inflammatory polyneuropathy, a disorder affecting multiple peripheral nerves because of inflammation. It is used when the record documents this diagnosis rather than a more specific subtype.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include symmetric weakness, sensory changes, and reduced reflexes, but you should code only what the provider confirms.
When to use this code
Use G61 when the clinician documents inflammatory polyneuropathy and does not specify a more detailed diagnosis. It may also fit follow-up visits for the same confirmed condition, as long as the record supports ongoing active care.
If the note names a distinct inflammatory neuropathy subtype, code that more specific diagnosis instead. Check documentation for laterality, acuity, and any associated neurologic deficits that may affect coding.
Do not use for
Do not use G61 for noninflammatory neuropathies, isolated mononeuropathies, or peripheral nerve symptoms without a confirmed diagnosis. Check documentation if the provider only lists weakness, numbness, or paresthesia.
Coding tip
Code the most specific inflammatory neuropathy documented, and avoid G61 when the record supports a different, more precise neuropathy code.