ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.8 > O36.82 > O36.822 O36.822 Fetal anemia and thrombocytopenia, second trimester Non-Billable/Non-Specific Codes O36.8220..., not applicable or unspecifiedO36.8221..., fetus 1O36.8222..., fetus 2O36.8223..., fetus 3O36.8224..., fetus 4O36.8225..., fetus 5O36.8229..., other fetus