Atresia of foramina of Magendie and Luschka

This code signifies a congenital malformation characterized by the absence or abnormal closure of the foramina of Magendie and Luschka, which are crucial for cerebrospinal fluid (CSF) outflow from the fourth ventricle. This obstruction leads to non-communicating hydrocephalus, causing CSF accumulation within the ventricular system.

Use this code for documented cases of congenital atresia affecting the foramina of Magendie and Luschka, typically identified in neonates or infants presenting with signs of hydrocephalus. Supporting documentation should include imaging reports (e.g., MRI, CT) confirming the structural anomaly and clinical notes detailing the associated neurological symptoms.

• Ensure documentation explicitly states "atresia" or "obstruction" of both Magendie and Luschka foramina; mere hydrocephalus is insufficient.
• Distinguish from other forms of congenital hydrocephalus (e.g., aqueductal stenosis) which have different ICD-10-CM codes.
• Code any associated neurological deficits or developmental delays separately as secondary diagnoses.