ICD-10 Code G93.4 – Other and unspecified encephalopathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G93.4 – Other and unspecified encephalopathy
What it is
G93.4 identifies encephalopathy when the chart does not specify a more exact cause or type. Use it for a generalized brain dysfunction diagnosis documented without clearer detail.
Clinical signs
Typical findings include altered mental status, confusion, reduced alertness, or cognitive change. Clinical features vary; refer to documentation.
When to use this code
Use G93.4 when the provider documents encephalopathy but does not name a specific category such as toxic, metabolic, or other defined cause. It also fits unspecified encephalopathy when the record supports brain dysfunction but lacks further detail. Check documentation if the cause is later clarified.
Do not use for
Do not use this code when the encephalopathy type is specified elsewhere in the chart. Avoid it for altered consciousness alone without a documented encephalopathy diagnosis.
Coding tip
Query the provider when the note mentions encephalopathy but the cause or type is unclear.