ICD-10 Code G65.0 – Sequelae of Guillain-Barré syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G65.0 – Sequelae of Guillain-Barré syndrome
What it is
G65.0 identifies residual neurologic problems that remain after Guillain-Barré syndrome has ended. Use it for lasting effects, not for the acute demyelinating illness itself.
Clinical signs
Clinical features vary; refer to documentation. Common sequelae may include persistent weakness, reduced reflexes, sensory changes, or gait difficulty after recovery from the original episode.
When to use this code
Use this code when the record clearly states that the patient has aftereffects from a prior Guillain-Barré syndrome episode. It fits follow-up visits focused on chronic deficits rather than active disease. You should code the residual condition only when the provider links it to the past illness.
Do not use for
Do not use G65.0 for acute Guillain-Barré syndrome or for symptoms without documentation of a sequela. Check documentation if the note does not clearly connect the current deficit to the prior event.
Coding tip
Look for wording such as “sequela,” “residual,” or “late effect” tied to prior Guillain-Barré syndrome before assigning G65.0.