ICD-10-CM > O00-O9A > O30-O48 > O35 > O35.0 > O35.01 O35.01 Maternal care for (suspected) central nervous system malformation or damage in fetus, agenesis of the corpus callosum Non-Billable/Non-Specific Codes O35.01X0..., not applicable or unspecifiedO35.01X1..., fetus 1O35.01X2..., fetus 2O35.01X3..., fetus 3O35.01X4..., fetus 4O35.01X5..., fetus 5O35.01X9..., other fetus