ICD-10 Code G65.1 – Sequelae of other inflammatory polyneuropathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G65.1 – Sequelae of other inflammatory polyneuropathy
What it is
G65.1 identifies lingering effects from a prior inflammatory polyneuropathy. Use it when the acute illness has resolved, but residual nerve-related problems remain.
Clinical signs
Clinical features vary; refer to documentation. Residual weakness, sensory loss, numbness, or gait difficulty may be noted after the original inflammatory neuropathy.
When to use this code
Use this code when the record clearly states the current condition is a sequela of an earlier inflammatory polyneuropathy. It fits follow-up visits where persistent neurologic deficits are being managed after the acute phase. You should link the residual findings to the prior disorder in the documentation.
Do not use for
Do not use G65.1 for active inflammatory polyneuropathy without sequelae. Do not assign it when the chart does not document a prior inflammatory cause or when the current problem is better explained by another neuropathy.
Coding tip
Code the residual deficit first, and verify that the provider explicitly documents the condition as a sequela.