| O249 | Unspecified diabetes mellitus in pregnancy, childbirth and the puerperium |
| O2491 | Unspecified diabetes mellitus in pregnancy |
| O24911 | Unspecified diabetes mellitus in pregnancy, first trimester |
| O24912 | Unspecified diabetes mellitus in pregnancy, second trimester Unspecified diabetes mellitus in pregnancy, second trimester |
| O24913 | Unspecified diabetes mellitus in pregnancy, third trimester |
| O24919 | Unspecified diabetes mellitus in pregnancy, unspecified trimester |
| O2492 | Unspecified diabetes mellitus in childbirth |
| O2493 | Unspecified diabetes mellitus in the puerperium |
| O25 | Malnutrition in pregnancy, childbirth and the puerperium |
| O251 | Malnutrition in pregnancy |
| O2510 | Malnutrition in pregnancy, unspecified trimester |
| O2511 | Malnutrition in pregnancy, first trimester |
| O2512 | Malnutrition in pregnancy, second trimester |
| O2513 | Malnutrition in pregnancy, third trimester |
| O252 | Malnutrition in childbirth |
| O253 | Malnutrition in the puerperium |
| O26 | Maternal care for oth conditions predom related to pregnancy Maternal care for other conditions predominantly related to pregnancy |
| O260 | Excessive weight gain in pregnancy |
| O2600 | Excessive weight gain in pregnancy, unspecified trimester |
| O2601 | Excessive weight gain in pregnancy, first trimester |
| O2602 | Excessive weight gain in pregnancy, second trimester |
| O2603 | Excessive weight gain in pregnancy, third trimester |
| O261 | Low weight gain in pregnancy |
| O2610 | Low weight gain in pregnancy, unspecified trimester |
| O2611 | Low weight gain in pregnancy, first trimester |
| O2612 | Low weight gain in pregnancy, second trimester |
| O2613 | Low weight gain in pregnancy, third trimester |
| O262 | Pregnancy care for patient with recurrent pregnancy loss |
| O2620 | Pregnancy care for patient with recurrent pregnancy loss, unspecified trimester |
| O2621 | Preg care for patient w recurrent preg loss, first trimester Pregnancy care for patient with recurrent pregnancy loss, first trimester |
| O2622 | Pregnancy care for patient with recurrent pregnancy loss, second trimester |
| O2623 | Preg care for patient w recurrent preg loss, third trimester Pregnancy care for patient with recurrent pregnancy loss, third trimester |
| O263 | Retained intrauterine contraceptive device in pregnancy |
| O2630 | Retained intrauterine contraceptive device in pregnancy, unspecified trimester |
| O2631 | Retained intrauterine contraceptive device in pregnancy, first trimester |
| O2632 | Retained uterin contracep dev in pregnancy, second trimester Retained intrauterine contraceptive device in pregnancy, second trimester |
| O2633 | Retained intrauterine contraceptive device in pregnancy, third trimester |
| O264 | Herpes gestationis |
| O2640 | Herpes gestationis, unspecified trimester |
| O2641 | Herpes gestationis, first trimester |
| O2642 | Herpes gestationis, second trimester |
| O2643 | Herpes gestationis, third trimester |
| O265 | Maternal hypotension syndrome |
| O2650 | Maternal hypotension syndrome, unspecified trimester |
| O2651 | Maternal hypotension syndrome, first trimester |
| O2652 | Maternal hypotension syndrome, second trimester |
| O2653 | Maternal hypotension syndrome, third trimester |
| O266 | Liver and biliary tract disorders in pregnancy, childbirth and the puerperium |
| O2661 | Liver and biliary tract disorders in pregnancy |
| O26611 | Liver and biliary tract disord in pregnancy, first trimester Liver and biliary tract disorders in pregnancy, first trimester |