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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Congenital Anomalies 740-759 > ICD-9-CM Diagnosis 740 Anencephalus and similar anomalies 740 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 740.0 Anencephalus A malformation of the nervous system caused by failure of the anterior neuropore to close. Infants are born with intact spinal cords, cerebellums, and brainstems, but lack formation of neural structures above this level. The skull is only partially formed but the eyes are usually normal. This condition may be associated with folate deficiency. Affected infants are only capable of primitive (brain stem) reflexes and usually do not survive for more than two weeks. (From Menkes, Textbook of Child Neurology, 5th ed, p247) 740.0 is a specific code that can be used to specify a diagnosis 740.0 contains 25 index entries ICD-9-CM Diagnosis 740.1 Craniorachischisis 740.1 is a specific code that can be used to specify a diagnosis 740.1 contains 1 index entry ICD-9-CM Diagnosis 740.2 Iniencephaly 740.2 is a specific code that can be used to specify a diagnosis 740.2 contains 1 index entry