ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.8 > O36.80 O36.80 Pregnancy with inconclusive fetal viability Non-Billable/Non-Specific Applicable To Encounter to determine fetal viability of pregnancy Codes O36.80X0..., not applicable or unspecifiedO36.80X1..., fetus 1O36.80X2..., fetus 2O36.80X3..., fetus 3O36.80X4..., fetus 4O36.80X5..., fetus 5O36.80X9..., other fetus