ICD-10-CM > O00-O9A > O30-O48 > O35 > O35.1 > O35.15 O35.15 Maternal care for (suspected) chromosomal abnormality in fetus, sex chromosome abnormality Non-Billable/Non-Specific Codes O35.15X0..., not applicable or unspecifiedO35.15X1..., fetus 1O35.15X2..., fetus 2O35.15X3..., fetus 3O35.15X4..., fetus 4O35.15X5..., fetus 5O35.15X9..., other fetus