FOXG1 syndrome

FOXG1 syndrome is a severe neurodevelopmental disorder characterized by microcephaly, developmental delay, intellectual disability, epilepsy, and absent or limited expressive language. It is caused by a mutation in the FOXG1 gene, leading to abnormal brain development. Patients often present with dyskinetic movements, feeding difficulties, and sleep disturbances.

This code is used for patients diagnosed with FOXG1 syndrome based on clinical presentation and confirmed genetic testing. It applies when documentation explicitly states the diagnosis of FOXG1 syndrome, often supported by genetic reports identifying a pathogenic variant in the FOXG1 gene. Use this code for initial diagnosis and subsequent encounters related to managing the syndrome.

• Ensure genetic testing results or a definitive clinical diagnosis of FOXG1 syndrome are documented.
• Code all associated manifestations, such as epilepsy (G40.-), microcephaly (Q02), and intellectual disabilities (F70-F79), as secondary diagnoses.
• Do not confuse with other genetic neurodevelopmental disorders unless FOXG1 syndrome is specifically identified.