| O36.191 | Maternal care for other isoimmunization, first trimester | NON-BILLABLE CODE |
| O36.1910 | Maternal care for other isoimmunization, first trimester, not applicable or unspecified | BILLABLE CODE |
| O36.1911 | Maternal care for other isoimmunization, first trimester, fetus 1 | BILLABLE CODE |
| O36.1912 | Maternal care for other isoimmunization, first trimester, fetus 2 | BILLABLE CODE |
| O36.1913 | Maternal care for other isoimmunization, first trimester, fetus 3 | BILLABLE CODE |
| O36.1914 | Maternal care for other isoimmunization, first trimester, fetus 4 | BILLABLE CODE |
| O36.1915 | Maternal care for other isoimmunization, first trimester, fetus 5 | BILLABLE CODE |
| O36.1919 | Maternal care for other isoimmunization, first trimester, other fetus | BILLABLE CODE |
| O36.192 | Maternal care for other isoimmunization, second trimester | NON-BILLABLE CODE |
| O36.1920 | Maternal care for other isoimmunization, second trimester, not applicable or unspecified | BILLABLE CODE |
| O36.1921 | Maternal care for other isoimmunization, second trimester, fetus 1 | BILLABLE CODE |
| O36.1922 | Maternal care for other isoimmunization, second trimester, fetus 2 | BILLABLE CODE |
| O36.1923 | Maternal care for other isoimmunization, second trimester, fetus 3 | BILLABLE CODE |
| O36.1924 | Maternal care for other isoimmunization, second trimester, fetus 4 | BILLABLE CODE |
| O36.1925 | Maternal care for other isoimmunization, second trimester, fetus 5 | BILLABLE CODE |
| O36.1929 | Maternal care for other isoimmunization, second trimester, other fetus | BILLABLE CODE |
| O36.193 | Maternal care for other isoimmunization, third trimester | NON-BILLABLE CODE |
| O36.1930 | Maternal care for other isoimmunization, third trimester, not applicable or unspecified | BILLABLE CODE |
| O36.1931 | Maternal care for other isoimmunization, third trimester, fetus 1 | BILLABLE CODE |
| O36.1932 | Maternal care for other isoimmunization, third trimester, fetus 2 | BILLABLE CODE |
| O36.1933 | Maternal care for other isoimmunization, third trimester, fetus 3 | BILLABLE CODE |
| O36.1934 | Maternal care for other isoimmunization, third trimester, fetus 4 | BILLABLE CODE |
| O36.1935 | Maternal care for other isoimmunization, third trimester, fetus 5 | BILLABLE CODE |
| O36.1939 | Maternal care for other isoimmunization, third trimester, other fetus | BILLABLE CODE |
| O36.199 | Maternal care for other isoimmunization, unspecified trimester | NON-BILLABLE CODE |
| O36.1990 | Maternal care for other isoimmunization, unspecified trimester, not applicable or unspecified | BILLABLE CODE |
| O36.1991 | Maternal care for other isoimmunization, unspecified trimester, fetus 1 | BILLABLE CODE |
| O36.1992 | Maternal care for other isoimmunization, unspecified trimester, fetus 2 | BILLABLE CODE |
| O36.1993 | Maternal care for other isoimmunization, unspecified trimester, fetus 3 | BILLABLE CODE |
| O36.1994 | Maternal care for other isoimmunization, unspecified trimester, fetus 4 | BILLABLE CODE |
| O36.1995 | Maternal care for other isoimmunization, unspecified trimester, fetus 5 | BILLABLE CODE |
| O36.1999 | Maternal care for other isoimmunization, unspecified trimester, other fetus | BILLABLE CODE |
