Fetal hydantoin syndrome

This code represents a pattern of birth defects and developmental abnormalities caused by exposure to phenytoin (an anticonvulsant) during fetal development. It typically involves characteristic facial features, growth deficiency, intellectual disability, and limb abnormalities. The syndrome results from the teratogenic effects of the drug crossing the placental barrier.

Use this code when documentation confirms a diagnosis of Fetal Hydantoin Syndrome in an infant or child, directly linked to maternal phenytoin use during pregnancy. This diagnosis is often made based on a combination of clinical findings and a confirmed history of maternal antiepileptic drug exposure.

• Ensure documentation explicitly states "Fetal Hydantoin Syndrome" or provides sufficient detail of characteristic features with a confirmed history of maternal phenytoin exposure.
• Do not confuse with other teratogenic syndromes; confirm the specific drug exposure.
• Code any associated congenital anomalies or intellectual disabilities separately, in addition to this code, if documented.