ICD-10-CM > O00-O9A > O30-O48 > O35 > O35.0 > O35.02 O35.02 Maternal care for (suspected) central nervous system malformation or damage in fetus, anencephaly Non-Billable/Non-Specific Codes O35.02X0..., not applicable or unspecifiedO35.02X1..., fetus 1O35.02X2..., fetus 2O35.02X3..., fetus 3O35.02X4..., fetus 4O35.02X5..., fetus 5O35.02X9..., other fetus