Wernicke's encephalopathy

This code identifies Wernicke's encephalopathy, an acute neuropsychiatric syndrome caused by thiamine (vitamin B1) deficiency. It is characterized by a classic triad of ocular abnormalities (nystagmus, ophthalmoplegia), ataxia, and global confusion. Untreated, it can progress to Korsakoff syndrome.

Apply this code for patients presenting with the characteristic neurological symptoms directly attributable to thiamine deficiency. Documentation should clearly indicate a diagnosis of Wernicke's encephalopathy, often supported by clinical presentation, risk factors (e.g., chronic alcoholism, malnutrition, hyperemesis gravidarum), and response to thiamine supplementation.

• Differentiate from other encephalopathies; ensure documentation specifies thiamine deficiency as the etiology.
• Consider sequencing with codes for underlying conditions contributing to thiamine deficiency (e.g., F10.20 for alcohol dependence).
• Do not confuse with Korsakoff syndrome (F10.688), which represents the chronic sequelae of Wernicke's.