Congenital malformation syndromes due to known exogenous causes, not elsewhere classified (Q86)

The Q86 ICD-10 code section identifies congenital malformation syndromes caused by known external substances during pregnancy. It includes specific conditions like Fetal Alcohol Syndrome (Q86.0) and other syndromes linked to exposure to drugs or chemicals before birth.

This category is used for coding birth defects resulting from harmful environmental factors, sometimes called exogenous causes. For instance, the ICD-10 code for Fetal Alcohol Syndrome (also known as Fetal Alcohol Spectrum Disorder) is Q86.0, which describes growth problems and developmental abnormalities due to prenatal alcohol exposure. Similarly, Q86.1 covers Fetal Hydantoin Syndrome caused by certain anti-seizure medications, and Q86.2 denotes dysmorphic features from warfarin, a blood thinner. The broader code Q86.8 includes various other teratogenic syndromes such as those from isotretinoin, valproic acid, benzodiazepines, and other drugs or chemicals known to cause birth defects. These detailed codes help accurately capture the specific cause of congenital anomalies related to environmental exposures.