| O0973 | Supervision of high risk pregnancy due to social problems, third trimester |
| O098 | Supervision of other high risk pregnancies |
| O0981 | Supervision of pregnancy resulting from assisted reproductive technology |
| O09811 | Suprvsn of preg rslt from assisted reprodctv tech, first tri Supervision of pregnancy resulting from assisted reproductive technology, first trimester |
| O09812 | Supervision of pregnancy resulting from assisted reproductive technology, second trimester |
| O09813 | Suprvsn of preg rslt from assisted reprodctv tech, third tri Supervision of pregnancy resulting from assisted reproductive technology, third trimester |
| O09819 | Supervision of pregnancy resulting from assisted reproductive technology, unspecified trimester |
| O0982 | Supervision of pregnancy with history of in utero procedure during previous pregnancy |
| O09821 | Suprvsn of preg w hx of in utero proc dur prev preg, 1st tri Supervision of pregnancy with history of in utero procedure during previous pregnancy, first trimester |
| O09822 | Suprvsn of preg w hx of in utero proc dur prev preg, 2nd tri Supervision of pregnancy with history of in utero procedure during previous pregnancy, second trimester |
| O09823 | Suprvsn of preg w hx of in utero proc dur prev preg, 3rd tri Supervision of pregnancy with history of in utero procedure during previous pregnancy, third trimester |
| O09829 | Suprvsn of preg w hx of in utero proc dur prev preg,unsp tri Supervision of pregnancy with history of in utero procedure during previous pregnancy, unspecified trimester |
| O0989 | Supervision of other high risk pregnancies |
| O09891 | Supervision of other high risk pregnancies, first trimester |
| O09892 | Supervision of other high risk pregnancies, second trimester Supervision of other high risk pregnancies, second trimester |
| O09893 | Supervision of other high risk pregnancies, third trimester |
| O09899 | Supervision of other high risk pregnancies, unspecified trimester |
| O099 | Supervision of high risk pregnancy, unspecified |
| O0990 | Supervision of high risk pregnancy, unspecified, unspecified trimester |
| O0991 | Supervision of high risk pregnancy, unspecified, first trimester |
| O0992 | Supervision of high risk pregnancy, unspecified, second trimester |
| O0993 | Supervision of high risk pregnancy, unspecified, third trimester |
| O09A | Supervision of pregnancy with history of molar pregnancy |
| O09A0 | Supervision of pregnancy with history of molar pregnancy, unspecified trimester |
| O09A1 | Supervision of pregnancy with history of molar pregnancy, first trimester |
| O09A2 | Suprvsn of preg with history of molar preg, second trimester Supervision of pregnancy with history of molar pregnancy, second trimester |
| O09A3 | Supervision of pregnancy with history of molar pregnancy, third trimester |
| O10 | Pre-existing hypertension complicating pregnancy, childbirth and the puerperium |
| O100 | Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium |
| O1001 | Pre-existing essential hypertension complicating pregnancy |
| O10011 | Pre-existing essential hypertension complicating pregnancy, first trimester |
| O10012 | Pre-existing essential hypertension complicating pregnancy, second trimester |
| O10013 | Pre-existing essential hypertension complicating pregnancy, third trimester |
| O10019 | Pre-existing essential hypertension complicating pregnancy, unspecified trimester |
| O1002 | Pre-existing essential hypertension complicating childbirth |
| O1003 | Pre-existing essential hypertension complicating the puerperium |
| O101 | Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium |
| O1011 | Pre-existing hypertensive heart disease complicating pregnancy |
| O10111 | Pre-existing hypertensive heart disease complicating pregnancy, first trimester |
| O10112 | Pre-exist hyp heart disease comp pregnancy, second trimester Pre-existing hypertensive heart disease complicating pregnancy, second trimester |
| O10113 | Pre-existing hypertensive heart disease complicating pregnancy, third trimester |
| O10119 | Pre-existing hypertensive heart disease complicating pregnancy, unspecified trimester |
| O1012 | Pre-existing hypertensive heart disease complicating childbirth |
| O1013 | Pre-existing hypertensive heart disease complicating the puerperium |
| O102 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, childbirth and the puerperium |
| O1021 | Pre-existing hypertensive chronic kidney disease complicating pregnancy |
| O10211 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, first trimester |
| O10212 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, second trimester |
| O10213 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, third trimester |
| O10219 | Pre-existing hypertensive chronic kidney disease complicating pregnancy, unspecified trimester |