ICD-10-CM > O00-O9A > O30-O48 > O35 > O35.0 > O35.05 O35.05 Maternal care for (suspected) central nervous system malformation or damage in fetus, holoprosencephaly Non-Billable/Non-Specific Codes O35.05X0..., not applicable or unspecifiedO35.05X1..., fetus 1O35.05X2..., fetus 2O35.05X3..., fetus 3O35.05X4..., fetus 4O35.05X5..., fetus 5O35.05X9..., other fetus