ICD-10-CM > O00-O9A > O30-O48 > O33 > O33.4 O33.4 Maternal care for disproportion of mixed maternal and fetal origin Non-Billable/Non-Specific Codes O33.4XX0..., not applicable or unspecifiedO33.4XX1..., fetus 1O33.4XX2..., fetus 2O33.4XX3..., fetus 3O33.4XX4..., fetus 4O33.4XX5..., fetus 5O33.4XX9..., other fetus