| O411235 | Chorioamnionitis, third trimester, fetus 5 |
| O411239 | Chorioamnionitis, third trimester, other fetus |
| O411290 | Chorioamnionitis, unspecified trimester, not applicable or unspecified |
| O411291 | Chorioamnionitis, unspecified trimester, fetus 1 |
| O411292 | Chorioamnionitis, unspecified trimester, fetus 2 |
| O411293 | Chorioamnionitis, unspecified trimester, fetus 3 |
| O411294 | Chorioamnionitis, unspecified trimester, fetus 4 |
| O411295 | Chorioamnionitis, unspecified trimester, fetus 5 |
| O411299 | Chorioamnionitis, unspecified trimester, other fetus |
| O411410 | Placentitis, first trimester, not applicable or unspecified |
| O411411 | Placentitis, first trimester, fetus 1 |
| O411412 | Placentitis, first trimester, fetus 2 |
| O411413 | Placentitis, first trimester, fetus 3 |
| O411414 | Placentitis, first trimester, fetus 4 |
| O411415 | Placentitis, first trimester, fetus 5 |
| O411419 | Placentitis, first trimester, other fetus |
| O411420 | Placentitis, second trimester, not applicable or unspecified |
| O411421 | Placentitis, second trimester, fetus 1 |
| O411422 | Placentitis, second trimester, fetus 2 |
| O411423 | Placentitis, second trimester, fetus 3 |
| O411424 | Placentitis, second trimester, fetus 4 |
| O411425 | Placentitis, second trimester, fetus 5 |
| O411429 | Placentitis, second trimester, other fetus |
| O411430 | Placentitis, third trimester, not applicable or unspecified |
| O411431 | Placentitis, third trimester, fetus 1 |
| O411432 | Placentitis, third trimester, fetus 2 |
| O411433 | Placentitis, third trimester, fetus 3 |
| O411434 | Placentitis, third trimester, fetus 4 |
| O411435 | Placentitis, third trimester, fetus 5 |
| O411439 | Placentitis, third trimester, other fetus |
| O411490 | Placentitis, unspecified trimester, not applicable or unspecified |
| O411491 | Placentitis, unspecified trimester, fetus 1 |
| O411492 | Placentitis, unspecified trimester, fetus 2 |
| O411493 | Placentitis, unspecified trimester, fetus 3 |
| O411494 | Placentitis, unspecified trimester, fetus 4 |
| O411495 | Placentitis, unspecified trimester, fetus 5 |
| O411499 | Placentitis, unspecified trimester, other fetus |
| O418X10 | Other specified disorders of amniotic fluid and membranes, first trimester, not applicable or unspecified |
| O418X11 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 1 |
| O418X12 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 2 |
| O418X13 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 3 |
| O418X14 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 4 |
| O418X15 | Other specified disorders of amniotic fluid and membranes, first trimester, fetus 5 |
| O418X19 | Other specified disorders of amniotic fluid and membranes, first trimester, other fetus |
| O418X20 | Other specified disorders of amniotic fluid and membranes, second trimester, not applicable or unspecified |
| O418X21 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 1 |
| O418X22 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 2 |
| O418X23 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 3 |
| O418X24 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 4 |
| O418X25 | Other specified disorders of amniotic fluid and membranes, second trimester, fetus 5 |
| O418X29 | Other specified disorders of amniotic fluid and membranes, second trimester, other fetus |
| O418X30 | Other specified disorders of amniotic fluid and membranes, third trimester, not applicable or unspecified |
| O418X31 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 1 |
| O418X32 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 2 |
| O418X33 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 3 |
| O418X34 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 4 |
| O418X35 | Other specified disorders of amniotic fluid and membranes, third trimester, fetus 5 |
| O418X39 | Other specified disorders of amniotic fluid and membranes, third trimester, other fetus |
| O4191X0 | Disorder of amniotic fluid and membranes, unspecified, first trimester, not applicable or unspecified |
| O4191X1 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 1 |
| O4191X2 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 2 |
| O4191X3 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 3 |
| O4191X4 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 4 |
| O4191X5 | Disorder of amniotic fluid and membranes, unspecified, first trimester, fetus 5 |
| O4191X9 | Disorder of amniotic fluid and membranes, unspecified, first trimester, other fetus |
| O4192X0 | Disorder of amniotic fluid and membranes, unspecified, second trimester, not applicable or unspecified |
| O4192X1 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 1 |
| O4192X2 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 2 |
| O4192X3 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 3 |
| O4192X4 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 4 |
| O4192X5 | Disorder of amniotic fluid and membranes, unspecified, second trimester, fetus 5 |
| O4192X9 | Disorder of amniotic fluid and membranes, unspecified, second trimester, other fetus |
| O4193X0 | Disorder of amniotic fluid and membranes, unspecified, third trimester, not applicable or unspecified |
| O4193X1 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 1 |
| O4193X2 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 2 |
| O4193X3 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 3 |
| O4193X4 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 4 |
| O4193X5 | Disorder of amniotic fluid and membranes, unspecified, third trimester, fetus 5 |
| O4193X9 | Disorder of amniotic fluid and membranes, unspecified, third trimester, other fetus |
| O4200 | Premature rupture of membranes, onset of labor within 24 hours of rupture, unspecified weeks of gestation |
| O42011 | Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, first trimester |
| O42012 | Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, second trimester |
| O42013 | Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, third trimester |
| O42019 | Preterm premature rupture of membranes, onset of labor within 24 hours of rupture, unspecified trimester |
| O4202 | Full-term premature rupture of membranes, onset of labor within 24 hours of rupture |
| O4210 | Premature rupture of membranes, onset of labor more than 24 hours following rupture, unspecified weeks of gestation |
| O42111 | Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, first trimester |
| O42112 | Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, second trimester |
| O42113 | Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, third trimester |
| O42119 | Preterm premature rupture of membranes, onset of labor more than 24 hours following rupture, unspecified trimester |
| O4212 | Full-term premature rupture of membranes, onset of labor more than 24 hours following rupture |
| O4290 | Premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified weeks of gestation |
| O42911 | Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, first trimester |
| O42912 | Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, second trimester |
| O42913 | Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, third trimester |
| O42919 | Preterm premature rupture of membranes, unspecified as to length of time between rupture and onset of labor, unspecified trimester |
| O4292 | Full-term premature rupture of membranes, unspecified as to length of time between rupture and onset of labor |
| O43011 | Fetomaternal placental transfusion syndrome, first trimester |
| O43012 | Fetomaternal placental transfusion syndrome, second trimester |
| O43013 | Fetomaternal placental transfusion syndrome, third trimester |
| O43021 | Fetus-to-fetus placental transfusion syndrome, first trimester |
| O43022 | Fetus-to-fetus placental transfusion syndrome, second trimester |
| O43023 | Fetus-to-fetus placental transfusion syndrome, third trimester |
| O43101 | Malformation of placenta, unspecified, first trimester |
| O43102 | Malformation of placenta, unspecified, second trimester |
| O43103 | Malformation of placenta, unspecified, third trimester |
| O43111 | Circumvallate placenta, first trimester |
| O43112 | Circumvallate placenta, second trimester |
| O43113 | Circumvallate placenta, third trimester |
| O43191 | Other malformation of placenta, first trimester |
| O43192 | Other malformation of placenta, second trimester |
| O43193 | Other malformation of placenta, third trimester |
| O43811 | Placental infarction, first trimester |
| O43812 | Placental infarction, second trimester |
| O43813 | Placental infarction, third trimester |
| O43891 | Other placental disorders, first trimester |
| O43892 | Other placental disorders, second trimester |
| O43893 | Other placental disorders, third trimester |
| O4391 | Unspecified placental disorder, first trimester |
| O4392 | Unspecified placental disorder, second trimester |
| O4393 | Unspecified placental disorder, third trimester |
| O4401 | Placenta previa specified as without hemorrhage, first trimester |
| O4402 | Placenta previa specified as without hemorrhage, second trimester |
| O4403 | Placenta previa specified as without hemorrhage, third trimester |
| O4411 | Placenta previa with hemorrhage, first trimester |
| O4412 | Placenta previa with hemorrhage, second trimester |
| O4413 | Placenta previa with hemorrhage, third trimester |
| O458X1 | Other premature separation of placenta, first trimester |
| O458X2 | Other premature separation of placenta, second trimester |
| O458X3 | Other premature separation of placenta, third trimester |
| O4591 | Premature separation of placenta, unspecified, first trimester |
| O4592 | Premature separation of placenta, unspecified, second trimester |
| O4593 | Premature separation of placenta, unspecified, third trimester |
| O468X1 | Other antepartum hemorrhage, first trimester |
| O468X2 | Other antepartum hemorrhage, second trimester |
| O468X3 | Other antepartum hemorrhage, third trimester |
| O4691 | Antepartum hemorrhage, unspecified, first trimester |
| O4692 | Antepartum hemorrhage, unspecified, second trimester |
| O4693 | Antepartum hemorrhage, unspecified, third trimester |
| O480 | Post-term pregnancy |
| O481 | Prolonged pregnancy |
| O6010X0 | Preterm labor with preterm delivery, unspecified trimester, not applicable or unspecified |
| O6010X1 | Preterm labor with preterm delivery, unspecified trimester, fetus 1 |
| O6010X2 | Preterm labor with preterm delivery, unspecified trimester, fetus 2 |
| O6010X3 | Preterm labor with preterm delivery, unspecified trimester, fetus 3 |
| O6010X4 | Preterm labor with preterm delivery, unspecified trimester, fetus 4 |
| O6010X5 | Preterm labor with preterm delivery, unspecified trimester, fetus 5 |
| O6010X9 | Preterm labor with preterm delivery, unspecified trimester, other fetus |
| O6020X0 | Term delivery with preterm labor, unspecified trimester, not applicable or unspecified |
| O6020X1 | Term delivery with preterm labor, unspecified trimester, fetus 1 |
| O6020X2 | Term delivery with preterm labor, unspecified trimester, fetus 2 |
| O6020X3 | Term delivery with preterm labor, unspecified trimester, fetus 3 |
| O6020X4 | Term delivery with preterm labor, unspecified trimester, fetus 4 |
| O6020X5 | Term delivery with preterm labor, unspecified trimester, fetus 5 |
| O6020X9 | Term delivery with preterm labor, unspecified trimester, other fetus |
| O610 | Failed medical induction of labor |
| O611 | Failed instrumental induction of labor |
| O618 | Other failed induction of labor |
| O619 | Failed induction of labor, unspecified |
| O620 | Primary inadequate contractions |
| O621 | Secondary uterine inertia |
| O622 | Other uterine inertia |
| O623 | Precipitate labor |
| O624 | Hypertonic, incoordinate, and prolonged uterine contractions |
| O628 | Other abnormalities of forces of labor |
| O629 | Abnormality of forces of labor, unspecified |
| O630 | Prolonged first stage (of labor) |
| O631 | Prolonged second stage (of labor) |
| O632 | Delayed delivery of second twin, triplet, etc. |
| O639 | Long labor, unspecified |
| O6640 | Failed trial of labor, unspecified |
| O6981X0 | Labor and delivery complicated by cord around neck, without compression, not applicable or unspecified |
| O6982X0 | Labor and delivery complicated by other cord entanglement, without compression, not applicable or unspecified |
| O6989X0 | Labor and delivery complicated by other cord complications, not applicable or unspecified |
| O7102 | Rupture of uterus before onset of labor, second trimester |
| O7103 | Rupture of uterus before onset of labor, third trimester |
| O752 | Pyrexia during labor, not elsewhere classified |
| O753 | Other infection during labor |
| O7589 | Other specified complications of labor and delivery |
| O759 | Complication of labor and delivery, unspecified |
| O76 | Abnormality in fetal heart rate and rhythm complicating labor and delivery |
| O88011 | Air embolism in pregnancy, first trimester |
| O88012 | Air embolism in pregnancy, second trimester |
| O88013 | Air embolism in pregnancy, third trimester |
| O88111 | Amniotic fluid embolism in pregnancy, first trimester |
| O88112 | Amniotic fluid embolism in pregnancy, second trimester |
| O88113 | Amniotic fluid embolism in pregnancy, third trimester |
| O88211 | Thromboembolism in pregnancy, first trimester |
| O88212 | Thromboembolism in pregnancy, second trimester |
| O88213 | Thromboembolism in pregnancy, third trimester |
| O88311 | Pyemic and septic embolism in pregnancy, first trimester |
| O88312 | Pyemic and septic embolism in pregnancy, second trimester |
| O88313 | Pyemic and septic embolism in pregnancy, third trimester |
| O88811 | Other embolism in pregnancy, first trimester |
| O88812 | Other embolism in pregnancy, second trimester |
| O88813 | Other embolism in pregnancy, third trimester |
| O91011 | Infection of nipple associated with pregnancy, first trimester |
| O91012 | Infection of nipple associated with pregnancy, second trimester |
| O91013 | Infection of nipple associated with pregnancy, third trimester |
| O91111 | Abscess of breast associated with pregnancy, first trimester |
| O91112 | Abscess of breast associated with pregnancy, second trimester |
| O91113 | Abscess of breast associated with pregnancy, third trimester |
| O91211 | Nonpurulent mastitis associated with pregnancy, first trimester |
| O91212 | Nonpurulent mastitis associated with pregnancy, second trimester |
| O91213 | Nonpurulent mastitis associated with pregnancy, third trimester |
| O92011 | Retracted nipple associated with pregnancy, first trimester |
| O92012 | Retracted nipple associated with pregnancy, second trimester |
| O92013 | Retracted nipple associated with pregnancy, third trimester |
| O92111 | Cracked nipple associated with pregnancy, first trimester |
| O92112 | Cracked nipple associated with pregnancy, second trimester |
| O92113 | Cracked nipple associated with pregnancy, third trimester |
| O99111 | Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, first trimester |
| O99112 | Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, second trimester |
| O99113 | Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, third trimester |
| O99211 | Obesity complicating pregnancy, first trimester |
| O99212 | Obesity complicating pregnancy, second trimester |
| O99213 | Obesity complicating pregnancy, third trimester |
| O99331 | Smoking (tobacco) complicating pregnancy, first trimester |
| O99332 | Smoking (tobacco) complicating pregnancy, second trimester |
| O99333 | Smoking (tobacco) complicating pregnancy, third trimester |
| O99841 | Bariatric surgery status complicating pregnancy, first trimester |
| O99842 | Bariatric surgery status complicating pregnancy, second trimester |
| O99843 | Bariatric surgery status complicating pregnancy, third trimester |
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