Central pontine myelinolysis

This code represents a neurological disorder characterized by the destruction of the myelin sheath in the center of the pons, a part of the brainstem. It typically results from rapid correction of chronic hyponatremia, leading to osmotic demyelination. Patients often present with quadriparesis, pseudobulbar palsy, and locked-in syndrome.

Use this code when documentation clearly indicates a diagnosis of central pontine myelinolysis. This condition is usually iatrogenic, following overly aggressive treatment of low sodium levels. Supporting documentation should detail the patient's neurological deficits and, ideally, a history of hyponatremia and its correction.

• Always look for documentation of the underlying cause, such as hyponatremia, and code it as a secondary diagnosis.
• Differentiate from extrapontine myelinolysis, which affects other brain regions.
• Ensure the physician's documentation explicitly states "central pontine myelinolysis" or provides sufficient detail to confirm this specific diagnosis.