ICD-10 Code G65 – Sequelae of inflammatory and toxic polyneuropathies (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G65 – Sequelae of inflammatory and toxic polyneuropathies
What it is
G65 identifies lasting nerve problems that remain after an inflammatory or toxic polyneuropathy has occurred. Use it for residual effects, not for the original acute illness.
Clinical signs
Clinical features vary; refer to documentation. Common sequelae may include persistent weakness, sensory loss, pain, or reduced reflexes after the prior neuropathy has resolved or stabilized.
When to use this code
Use G65 when the record clearly states a residual condition caused by a previous inflammatory or toxic polyneuropathy. The underlying acute disorder is no longer the focus of care. You should link the current deficit to the prior neuropathic event when documentation supports that relationship.
Do not use for
Do not use G65 for active inflammatory or toxic polyneuropathy without sequelae. Do not assign it if the chart only notes nonspecific neuropathy or the cause is not documented.
Coding tip
Code the residual deficit only when the provider documents it as a sequela of a prior polyneuropathy.