ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.8 > O36.82 > O36.829 O36.829 Fetal anemia and thrombocytopenia, unspecified trimester Non-Billable/Non-Specific Codes O36.8290..., not applicable or unspecifiedO36.8291..., fetus 1O36.8292..., fetus 2O36.8293..., fetus 3O36.8294..., fetus 4O36.8295..., fetus 5O36.8299..., other fetus