ICD-10-CM > O00-O9A > O30-O48 > O36 > O36.0 > O36.09 O36.09 Maternal care for other rhesus isoimmunization Non-Billable/Non-Specific Codes O36.091Maternal care for other rhesus isoimmunization, first trimesterO36.0910..., not applicable or unspecifiedO36.0911..., fetus 1O36.0912..., fetus 2O36.0913..., fetus 3O36.0914..., fetus 4O36.0915..., fetus 5O36.0919..., other fetusO36.092Maternal care for other rhesus isoimmunization, second trimesterO36.0920..., not applicable or unspecifiedO36.0921..., fetus 1O36.0922..., fetus 2O36.0923..., fetus 3O36.0924..., fetus 4O36.0925..., fetus 5O36.0929..., other fetusO36.093Maternal care for other rhesus isoimmunization, third trimesterO36.0930..., not applicable or unspecifiedO36.0931..., fetus 1O36.0932..., fetus 2O36.0933..., fetus 3O36.0934..., fetus 4O36.0935..., fetus 5O36.0939..., other fetusO36.099Maternal care for other rhesus isoimmunization, unspecified trimesterO36.0990..., not applicable or unspecifiedO36.0991..., fetus 1O36.0992..., fetus 2O36.0993..., fetus 3O36.0994..., fetus 4O36.0995..., fetus 5O36.0999..., other fetus