| O33 | Maternal care for disproportion | NON-BILLABLE CODE |
| O33.0 | Maternal care for disproportion due to deformity of maternal pelvic bones | BILLABLE CODE |
| O33.1 | Maternal care for disproportion due to generally contracted pelvis | BILLABLE CODE |
| O33.2 | Maternal care for disproportion due to inlet contraction of pelvis | BILLABLE CODE |
| O33.3 | Maternal care for disproportion due to outlet contraction of pelvis | NON-BILLABLE CODE |
| O33.3XX0 | Maternal care for disproportion due to outlet contraction of pelvis, not applicable or unspecified | BILLABLE CODE |
| O33.3XX1 | Maternal care for disproportion due to outlet contraction of pelvis, fetus 1 | BILLABLE CODE |
| O33.3XX2 | Maternal care for disproportion due to outlet contraction of pelvis, fetus 2 | BILLABLE CODE |
| O33.3XX3 | Maternal care for disproportion due to outlet contraction of pelvis, fetus 3 | BILLABLE CODE |
| O33.3XX4 | Maternal care for disproportion due to outlet contraction of pelvis, fetus 4 | BILLABLE CODE |
| O33.3XX5 | Maternal care for disproportion due to outlet contraction of pelvis, fetus 5 | BILLABLE CODE |
| O33.3XX9 | Maternal care for disproportion due to outlet contraction of pelvis, other fetus | BILLABLE CODE |
| O33.4 | Maternal care for disproportion of mixed maternal and fetal origin | NON-BILLABLE CODE |
| O33.4XX0 | Maternal care for disproportion of mixed maternal and fetal origin, not applicable or unspecified | BILLABLE CODE |
| O33.4XX1 | Maternal care for disproportion of mixed maternal and fetal origin, fetus 1 | BILLABLE CODE |
| O33.4XX2 | Maternal care for disproportion of mixed maternal and fetal origin, fetus 2 | BILLABLE CODE |
| O33.4XX3 | Maternal care for disproportion of mixed maternal and fetal origin, fetus 3 | BILLABLE CODE |
| O33.4XX4 | Maternal care for disproportion of mixed maternal and fetal origin, fetus 4 | BILLABLE CODE |
| O33.4XX5 | Maternal care for disproportion of mixed maternal and fetal origin, fetus 5 | BILLABLE CODE |
| O33.4XX9 | Maternal care for disproportion of mixed maternal and fetal origin, other fetus | BILLABLE CODE |
| O33.5 | Maternal care for disproportion due to unusually large fetus | NON-BILLABLE CODE |
| O33.5XX0 | Maternal care for disproportion due to unusually large fetus, not applicable or unspecified | BILLABLE CODE |
| O33.5XX1 | Maternal care for disproportion due to unusually large fetus, fetus 1 | BILLABLE CODE |
| O33.5XX2 | Maternal care for disproportion due to unusually large fetus, fetus 2 | BILLABLE CODE |
| O33.5XX3 | Maternal care for disproportion due to unusually large fetus, fetus 3 | BILLABLE CODE |
| O33.5XX4 | Maternal care for disproportion due to unusually large fetus, fetus 4 | BILLABLE CODE |
| O33.5XX5 | Maternal care for disproportion due to unusually large fetus, fetus 5 | BILLABLE CODE |
| O33.5XX9 | Maternal care for disproportion due to unusually large fetus, other fetus | BILLABLE CODE |
| O33.6 | Maternal care for disproportion due to hydrocephalic fetus | NON-BILLABLE CODE |
| O33.6XX0 | Maternal care for disproportion due to hydrocephalic fetus, not applicable or unspecified | BILLABLE CODE |
| O33.6XX1 | Maternal care for disproportion due to hydrocephalic fetus, fetus 1 | BILLABLE CODE |
| O33.6XX2 | Maternal care for disproportion due to hydrocephalic fetus, fetus 2 | BILLABLE CODE |
| O33.6XX3 | Maternal care for disproportion due to hydrocephalic fetus, fetus 3 | BILLABLE CODE |
| O33.6XX4 | Maternal care for disproportion due to hydrocephalic fetus, fetus 4 | BILLABLE CODE |
| O33.6XX5 | Maternal care for disproportion due to hydrocephalic fetus, fetus 5 | BILLABLE CODE |
| O33.6XX9 | Maternal care for disproportion due to hydrocephalic fetus, other fetus | BILLABLE CODE |
| O33.7 | Maternal care for disproportion due to other fetal deformities | NON-BILLABLE CODE |
| O33.7XX0 | Maternal care for disproportion due to other fetal deformities, not applicable or unspecified | BILLABLE CODE |
| O33.7XX1 | Maternal care for disproportion due to other fetal deformities, fetus 1 | BILLABLE CODE |
| O33.7XX2 | Maternal care for disproportion due to other fetal deformities, fetus 2 | BILLABLE CODE |
| O33.7XX3 | Maternal care for disproportion due to other fetal deformities, fetus 3 | BILLABLE CODE |
| O33.7XX4 | Maternal care for disproportion due to other fetal deformities, fetus 4 | BILLABLE CODE |
| O33.7XX5 | Maternal care for disproportion due to other fetal deformities, fetus 5 | BILLABLE CODE |
| O33.7XX9 | Maternal care for disproportion due to other fetal deformities, other fetus | BILLABLE CODE |
| O33.8 | Maternal care for disproportion of other origin | BILLABLE CODE |
