ICD-10 Code G61.8 – Other inflammatory polyneuropathies (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G61.8 – Other inflammatory polyneuropathies
What it is
G61.8 identifies inflammatory polyneuropathies that do not fit a more specific ICD-10 category. Use it for documented immune-mediated or inflammatory nerve disorders when the record does not name another code.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include symmetric weakness, sensory changes, reduced reflexes, and peripheral nerve involvement consistent with an inflammatory polyneuropathy.
When to use this code
Use G61.8 when the clinician documents an inflammatory polyneuropathy, but the condition is not described as Guillain-Barré syndrome, chronic inflammatory demyelinating polyneuropathy, or another listed subtype. It also fits cases labeled “other” or unspecified inflammatory polyneuropathy when documentation supports an inflammatory process.
Do not use for
Do not use this code for noninflammatory neuropathies, mononeuropathies, or motor neuron disease. If the record names a more specific inflammatory neuropathy, code that condition instead.
Coding tip
Check documentation for the exact neuropathy type and whether the provider describes an inflammatory cause before assigning G61.8.