ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.8 > O36.82 O36.82 Fetal anemia and thrombocytopenia Non-Billable/Non-Specific Codes O36.821Fetal anemia and thrombocytopenia, first trimesterO36.8210..., not applicable or unspecifiedO36.8211..., fetus 1O36.8212..., fetus 2O36.8213..., fetus 3O36.8214..., fetus 4O36.8215..., fetus 5O36.8219..., other fetusO36.822Fetal anemia and thrombocytopenia, second trimesterO36.8220..., not applicable or unspecifiedO36.8221..., fetus 1O36.8222..., fetus 2O36.8223..., fetus 3O36.8224..., fetus 4O36.8225..., fetus 5O36.8229..., other fetusO36.823Fetal anemia and thrombocytopenia, third trimesterO36.8230..., not applicable or unspecifiedO36.8231..., fetus 1O36.8232..., fetus 2O36.8233..., fetus 3O36.8234..., fetus 4O36.8235..., fetus 5O36.8239..., other fetusO36.829Fetal anemia and thrombocytopenia, unspecified trimesterO36.8290..., not applicable or unspecifiedO36.8291..., fetus 1O36.8292..., fetus 2O36.8293..., fetus 3O36.8294..., fetus 4O36.8295..., fetus 5O36.8299..., other fetus