ICD-10 Code G83.83 – Posterior cord syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G83.83 – Posterior cord syndrome
What it is
Posterior cord syndrome is a spinal cord disorder affecting the dorsal columns. It can cause loss of vibration, position sense, and sensory ataxia below the level of the lesion.
Clinical signs
Typical findings include impaired proprioception, reduced vibration sense, and an unsteady gait, especially in the dark. Clinical features vary; refer to documentation.
When to use this code
Use G83.83 when the provider documents posterior cord syndrome or posterior column involvement as the diagnosis. Apply it for confirmed spinal cord disease with the characteristic sensory pattern, not for vague weakness alone. Check documentation if the record does not clearly identify the syndrome.
Do not use for
Do not use this code for general myelopathy, peripheral neuropathy, or nonspecific gait disturbance without posterior cord syndrome documented. If the chart only says “cord lesion,” check documentation.
Coding tip
Verify that the note names posterior cord syndrome or a posterior column lesion before assigning G83.83.