ICD-10-CM > O00-O9A > O30-O48 > O31 > O31.1 > O31.12 O31.12 Continuing pregnancy after spontaneous abortion of one fetus or more, second trimester Non-Billable/Non-Specific Codes O31.12X0..., not applicable or unspecifiedO31.12X1..., fetus 1O31.12X2..., fetus 2O31.12X3..., fetus 3O31.12X4..., fetus 4O31.12X5..., fetus 5O31.12X9..., other fetus