ICD-10-CM > O00-O9A > O60-O77 > O60 > O60.2 > O60.23 O60.23 Term delivery with preterm labor, third trimester Non-Billable/Non-Specific Codes O60.23X0..., not applicable or unspecifiedO60.23X1..., fetus 1O60.23X2..., fetus 2O60.23X3..., fetus 3O60.23X4..., fetus 4O60.23X5..., fetus 5O60.23X9..., other fetus