ICD-10 Code G90.4 – Autonomic dysreflexia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G90.4 – Autonomic dysreflexia
What it is
Autonomic dysreflexia is a sudden, excessive autonomic response caused by spinal cord injury, usually at or above the thoracic level. It can trigger dangerous blood pressure surges and requires prompt recognition.
Clinical signs
Clinical features vary; refer to documentation. Common findings include abrupt hypertension, headache, flushing above the level of injury, sweating, and bradycardia after a triggering stimulus below the injury level.
When to use this code
Use G90.4 when the record clearly documents autonomic dysreflexia as a diagnosis or complication. It may be appropriate during an acute episode tied to a spinal cord lesion, especially when the provider names the condition. If the note only mentions nonspecific autonomic symptoms, check documentation.
Do not use for
Do not use this code for general dysautonomia, orthostatic hypotension, or isolated hypertension without autonomic dysreflexia. If the provider describes another autonomic disorder, code that condition instead.
Coding tip
Link the episode to the documented spinal cord injury and code the autonomic dysreflexia only when the provider states it explicitly.