ICD-10-CM > O00-O9A > O30-O48 > O31 > O31.2 > O31.20 O31.20 Continuing pregnancy after intrauterine death of one fetus or more, unspecified trimester Non-Billable/Non-Specific Codes O31.20X0..., not applicable or unspecifiedO31.20X1..., fetus 1O31.20X2..., fetus 2O31.20X3..., fetus 3O31.20X4..., fetus 4O31.20X5..., fetus 5O31.20X9..., other fetus