Source Code Name Case count Share of cases (%)
OUTPAT OUTPAT_ICD10(O470) False labour before 37 completed weeks of gestation 11655
OUTPAT OUTPAT_ICD10(O342) Maternal care due to uterine scar from previous surgery 8818
INPAT INPAT_ICD10(O342) Maternal care due to uterine scar from previous surgery 6911
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O470) False labour before 37 completed weeks of gestation. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 6182
OUTPAT OUTPAT_ICD10(O321) Maternal care for breech presentation 6118
INPAT INPAT_ICD10(O470) False labour before 37 completed weeks of gestation 4816
OUTPAT OUTPAT_ICD10(O366) Maternal care for excessive fetal growth 4611
OUTPAT OUTPAT_ICD10(O429) Premature rupture of membranes, unspecified 4505
OUTPAT OUTPAT_ICD10(O471) False labour at or after 37 completed weeks of gestation 4371
INPAT INPAT_ICD10(O321) Maternal care for breech presentation 3941
OUTPAT OUTPAT_ICD10(O48) Prolonged pregnancy 3716
OUTPAT OUTPAT_ICD10(O365) Maternal care for poor fetal growth 3503
INPAT INPAT_ICD10(O48) Prolonged pregnancy 3477
INPAT INPAT_ICD10(O366) Maternal care for excessive fetal growth 3320
OUTPAT OUTPAT_ICD10(O351) Maternal care for (suspected) chromosomal abnormality in fetus 3088
OUTPAT OUTPAT_ICD10(O358) Maternal care for other (suspected) fetal abnormality and damage 2535
INPAT INPAT_ICD10(O365) Maternal care for poor fetal growth 2284
INPAT INPAT_ICD10(O429) Premature rupture of membranes, unspecified 2234
OUTPAT OUTPAT_ICD10(O410) Oligohydramnios 2155
OUTPAT OUTPAT_ICD10(O368) Maternal care for other specified fetal problems 2044
OUTPAT OUTPAT_ICD10(O469) Antepartum haemorrhage, unspecified 2019
INPAT INPAT_ICD10(O471) False labour at or after 37 completed weeks of gestation 1953
OUTPAT OUTPAT_ICD10(O300) Twin pregnancy 1947
OUTPAT OUTPAT_ICD10(O420) Premature rupture of membranes, onset of labour within 24 hours 1682
INPAT INPAT_ICD10(O410) Oligohydramnios 1658
INPAT INPAT_ICD10(O300) Twin pregnancy 1458
INPAT INPAT_ICD10(O421) Premature rupture of membranes, onset of labour after 24 hours 1309
OUTPAT OUTPAT_ICD10(O40) Polyhydramnios 1277
INPAT INPAT_ICD10(O420) Premature rupture of membranes, onset of labour within 24 hours 1228
OUTPAT OUTPAT_ICD10(O359) Maternal care for (suspected) fetal abnormality and damage, unspecified 1188
OUTPAT OUTPAT_ICD10(O479) False labour, unspecified 1184
INPAT INPAT_ICD10(O411) Infection of amniotic sac and membranes 1146
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O47) False labour. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 1073
INPAT INPAT_ICD10(O469) Antepartum haemorrhage, unspecified 1066
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O479) False labour, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 954
OUTPAT OUTPAT_ICD10(O440) Placenta praevia specified as without haemorrhage 898
INPAT INPAT_ICD10(O358) Maternal care for other (suspected) fetal abnormality and damage 779
OUTPAT OUTPAT_ICD10(O369) Maternal care for fetal problem, unspecified 684
OUTPAT OUTPAT_ICD10(O322) Maternal care for transverse and oblique lie 664
INPAT INPAT_ICD10(O40) Polyhydramnios 653
INPAT INPAT_ICD10(O369) Maternal care for fetal problem, unspecified 624
OUTPAT OUTPAT_ICD10(O421) Premature rupture of membranes, onset of labour after 24 hours 555
OUTPAT OUTPAT_ICD10(O441) Placenta praevia with haemorrhage 527
INPAT INPAT_ICD10(O364) Maternal care for intrauterine death 505
INPAT INPAT_ICD10(O368) Maternal care for other specified fetal problems 501
OUTPAT OUTPAT_ICD10(O343) Maternal care for cervical incompetence 500
INPAT INPAT_ICD10(O441) Placenta praevia with haemorrhage 480
OUTPAT OUTPAT_ICD10(O3000) Twin pregnancy with separate amniotic and chorionic sacs 473
OUTPAT OUTPAT_ICD10(O341) Maternal care for tumour of corpus uteri 448
INPAT INPAT_ICD10(O479) False labour, unspecified 437
OUTPAT OUTPAT_ICD10(O364) Maternal care for intrauterine death 420
OUTPAT OUTPAT_ICD10(O363) Maternal care for signs of fetal hypoxia 401
OUTPAT OUTPAT_ICD10(O320) Maternal care for unstable lie 385
INPAT INPAT_ICD10(O3000) Twin pregnancy with separate amniotic and chorionic sacs 369
INPAT INPAT_ICD10(O343) Maternal care for cervical incompetence 361
INPAT INPAT_ICD10(O440) Placenta praevia specified as without haemorrhage 359
OUTPAT OUTPAT_ICD10(O418) Other specified disorders of amniotic fluid and membranes 339
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O321) Maternal care for breech presentation. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 333
OUTPAT OUTPAT_ICD10(O419) Disorder of amniotic fluid and membranes, unspecified 324
INPAT INPAT_ICD10(O363) Maternal care for signs of fetal hypoxia 323
INPAT INPAT_ICD10(O459) Premature separation of placenta, unspecified 319
OUTPAT OUTPAT_ICD10(O352) Maternal care for (suspected) hereditary disease in fetus 304
OUTPAT OUTPAT_ICD10(O468) Other antepartum haemorrhage 300
OUTPAT OUTPAT_ICD10(O339) Maternal care for disproportion, unspecified 275
OUTPAT OUTPAT_ICD10(O340) Maternal care for congenital malformation of uterus 273
INPAT INPAT_ICD10(O322) Maternal care for transverse and oblique lie 264
INPAT INPAT_ICD10(O333) Maternal care for disproportion due to outlet contraction of pelvis 262
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O300) Twin pregnancy. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 253
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O342) Maternal care due to uterine scar from previous surgery. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 251
INPAT INPAT_ICD10(O351) Maternal care for (suspected) chromosomal abnormality in fetus 227
INPAT INPAT_ICD10(O341) Maternal care for tumour of corpus uteri 225
OUTPAT OUTPAT_ICD10(O335) Maternal care for disproportion due to unusually large fetus 211
INPAT INPAT_ICD10(O335) Maternal care for disproportion due to unusually large fetus 199
OUTPAT OUTPAT_ICD10(O348) Maternal care for other abnormalities of pelvic organs 196
OUTPAT OUTPAT_ICD10(O355) Maternal care for (suspected) damage to fetus by drugs 189
INPAT INPAT_ICD10(O331) Maternal care for disproportion due to generally contracted pelvis 185
INPAT INPAT_ICD10(O339) Maternal care for disproportion, unspecified 185
INPAT INPAT_ICD10(O320) Maternal care for unstable lie 184
INPAT INPAT_ICD10(O359) Maternal care for (suspected) fetal abnormality and damage, unspecified 178
OUTPAT OUTPAT_ICD10(O360) Maternal care for rhesus isoimmunization 171
INPAT INPAT_ICD10(O418) Other specified disorders of amniotic fluid and membranes 168
INPAT INPAT_ICD10(O334) Maternal care for disproportion of mixed maternal and fetal origin 164
OUTPAT OUTPAT_ICD10(O3001) Twin pregnancy with a shared chorionic sac and a separate amniotic sac 164
INPAT INPAT_ICD10(O468) Other antepartum haemorrhage 163
OUTPAT OUTPAT_ICD10(O344) Maternal care for other abnormalities of cervix 161
INPAT INPAT_ICD10(O340) Maternal care for congenital malformation of uterus 158
OUTPAT OUTPAT_ICD10(O350) Maternal care for (suspected) central nervous system malformation in fetus 157
INPAT INPAT_ICD10(O458) Other premature separation of placenta 152
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O366) Maternal care for excessive fetal growth. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 147
OUTPAT OUTPAT_ICD10(O333) Maternal care for disproportion due to outlet contraction of pelvis 143
INPAT INPAT_ICD10(O360) Maternal care for rhesus isoimmunization 139
INPAT INPAT_ICD10(O332) Maternal care for disproportion due to inlet contraction of pelvis 122
INPAT INPAT_ICD10(O422) Premature rupture of membranes, labour delayed by therapy 121
INPAT INPAT_ICD10(O3001) Twin pregnancy with a shared chorionic sac and a separate amniotic sac 120
OUTPAT OUTPAT_ICD10(O411) Infection of amniotic sac and membranes 112
OUTPAT OUTPAT_ICD10(O331) Maternal care for disproportion due to generally contracted pelvis 108
INPAT INPAT_ICD10(O328) Maternal care for other malpresentation of fetus 107
OUTPAT OUTPAT_ICD10(O349) Maternal care for abnormality of pelvic organ, unspecified 105
OUTPAT OUTPAT_ICD10(O354) Maternal care for (suspected) damage to fetus from alcohol 100
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O471) False labour at or after 37 completed weeks of gestation. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 96
OUTPAT OUTPAT_ICD10(O422) Premature rupture of membranes, labour delayed by therapy 95
INPAT INPAT_ICD10(O355) Maternal care for (suspected) damage to fetus by drugs 86
OUTPAT OUTPAT_ICD10(O332) Maternal care for disproportion due to inlet contraction of pelvis 83
OUTPAT OUTPAT_ICD10(O361) Maternal care for other isoimmunization 82
OUTPAT OUTPAT_ICD10(O347) Maternal care for abnormality of vulva and perineum 79
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O365) Maternal care for poor fetal growth. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 79
INPAT INPAT_ICD10(O344) Maternal care for other abnormalities of cervix 75
INPAT INPAT_ICD10(O347) Maternal care for abnormality of vulva and perineum 74
INPAT INPAT_ICD10(O348) Maternal care for other abnormalities of pelvic organs 73
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O358) Maternal care for other (suspected) fetal abnormality and damage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 73
INPAT INPAT_ICD10(O419) Disorder of amniotic fluid and membranes, unspecified 69
OUTPAT OUTPAT_ICD10(O301) Triplet pregnancy 66
INPAT INPAT_ICD10(O438) Other placental disorders 65
INPAT INPAT_ICD10(O330) Maternal care for disproportion due to deformity of maternal pelvic bones 64
OUTPAT OUTPAT_ICD10(O438) Other placental disorders 64
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O3000) Twin pregnancy with separate amniotic and chorionic sacs. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 64
OUTPAT OUTPAT_ICD10(O328) Maternal care for other malpresentation of fetus 62
OUTPAT OUTPAT_ICD10(O459) Premature separation of placenta, unspecified 61
INPAT INPAT_ICD10(O361) Maternal care for other isoimmunization 58
INPAT INPAT_ICD10(O350) Maternal care for (suspected) central nervous system malformation in fetus 57
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O469) Antepartum haemorrhage, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 57
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O48) Prolonged pregnancy. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 56
OUTPAT OUTPAT_ICD10(O312) Continuing pregnancy after intrauterine death of one fetus or more 53
OUTPAT OUTPAT_ICD10(O334) Maternal care for disproportion of mixed maternal and fetal origin 53
OUTPAT OUTPAT_ICD10(O47) False labour 53
OUTPAT OUTPAT_ICD10(O324) Maternal care for high head at term 52
OUTPAT OUTPAT_ICD10(O362) Maternal care for hydrops fetalis 50
INPAT INPAT_ICD10(O352) Maternal care for (suspected) hereditary disease in fetus 46
INPAT INPAT_ICD10(O301) Triplet pregnancy 43
INPAT INPAT_ICD10(O354) Maternal care for (suspected) damage to fetus from alcohol 43
INPAT INPAT_ICD10(O460) Antepartum haemorrhage with coagulation defect 43
INPAT INPAT_ICD10(O450) Premature separation of placenta with coagulation defect 42
INPAT INPAT_ICD10(O430) Placental transfusion syndromes 40
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O40) Polyhydramnios. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 40
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O322) Maternal care for transverse and oblique lie. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 39
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O440) Placenta praevia specified as without haemorrhage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 39
OUTPAT OUTPAT_ICD10(O309) Multiple gestation, unspecified 36
OUTPAT OUTPAT_ICD10(O439) Placental disorder, unspecified 36
INPAT INPAT_ICD10(O338) Maternal care for disproportion of other origin 34
OUTPAT OUTPAT_ICD10(O329) Maternal care for malpresentation of fetus, unspecified 34
INPAT INPAT_ICD10(O324) Maternal care for high head at term 32
OUTPAT OUTPAT_ICD10(O330) Maternal care for disproportion due to deformity of maternal pelvic bones 31
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O36) Maternal care for other known or suspected fetal problems. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 30
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O368) Maternal care for other specified fetal problems. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 30
INPAT INPAT_ICD10(O362) Maternal care for hydrops fetalis 29
OUTPAT OUTPAT_ICD10(O430) Placental transfusion syndromes 29
OUTPAT OUTPAT_ICD10(O311) Continuing pregnancy after abortion of one fetus or more 28
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O32) Maternal care for known or suspected malpresentation of fetus. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 28
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O410) Oligohydramnios. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 28
OUTPAT OUTPAT_ICD10(O318) Other complications specific to multiple gestation 27
OUTPAT OUTPAT_ICD10(O458) Other premature separation of placenta 27
INPAT INPAT_ICD10(O323) Maternal care for face, brow and chin presentation 26
INPAT INPAT_ICD10(O349) Maternal care for abnormality of pelvic organ, unspecified 26
OUTPAT OUTPAT_ICD10(O345) Maternal care for other abnormalities of gravid uterus 25
INPAT INPAT_ICD10(O312) Continuing pregnancy after intrauterine death of one fetus or more 24
INPAT INPAT_ICD10(O432) Morbidly adherent placenta 24
OUTPAT OUTPAT_ICD10(O356) Maternal care for (suspected) damage to fetus by radiation 24
INPAT INPAT_ICD10(O325) Maternal care for multiple gestation with malpresentation of one fetus or more 23
OUTPAT OUTPAT_ICD10(O460) Antepartum haemorrhage with coagulation defect 23
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O441) Placenta praevia with haemorrhage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 23
INPAT INPAT_ICD10(O318) Other complications specific to multiple gestation 21
OUTPAT OUTPAT_ICD10(O432) Morbidly adherent placenta 21
INPAT INPAT_ICD10(O439) Placental disorder, unspecified 20
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O3001) Twin pregnancy with a shared chorionic sac and a separate amniotic sac. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 20
OUTPAT OUTPAT_ICD10(O346) Maternal care for abnormality of vagina 19
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O343) Maternal care for cervical incompetence. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 19
INPAT INPAT_ICD10(O346) Maternal care for abnormality of vagina 18
OUTPAT OUTPAT_ICD10(O3002) Twin pregnancy with a shared amniotic and chorionic sac 17
OUTPAT OUTPAT_ICD10(O325) Maternal care for multiple gestation with malpresentation of one fetus or more 17
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O429) Premature rupture of membranes, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 17
INPAT INPAT_ICD10(O329) Maternal care for malpresentation of fetus, unspecified 15
OUTPAT OUTPAT_ICD10(O353) Maternal care for (suspected) damage to fetus from viral disease in mother 14
INPAT INPAT_ICD10(O311) Continuing pregnancy after abortion of one fetus or more 13
OUTPAT OUTPAT_ICD10(O338) Maternal care for disproportion of other origin 12
OUTPAT OUTPAT_ICD10(O431) Malformation of placenta 12
OUTPAT OUTPAT_ICD10(O326) Maternal care for compound presentation 11
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O341) Maternal care for tumour of corpus uteri. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 11
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O468) Other antepartum haemorrhage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 11
OUTPAT OUTPAT_ICD10(O302) Quadruplet pregnancy 10
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O44) Placenta praevia. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 10
OUTPAT OUTPAT_ICD10(O30) Multiple gestation 9
OUTPAT OUTPAT_ICD10(O308) Other multiple gestation 9
OUTPAT OUTPAT_ICD10(O310) Papyraceous fetus 9
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O320) Maternal care for unstable lie. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 9
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O344) Maternal care for other abnormalities of cervix. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 9
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O364) Maternal care for intrauterine death. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 9
INPAT INPAT_ICD10(O3002) Twin pregnancy with a shared amniotic and chorionic sac 8
INPAT INPAT_ICD10(O345) Maternal care for other abnormalities of gravid uterus 8
OUTPAT OUTPAT_ICD10(O367) Maternal care for viable fetus in abdominal pregnancy 8
OUTPAT OUTPAT_ICD10(O42) Premature rupture of membranes 8
INPAT INPAT_ICD10(O309) Multiple gestation, unspecified 7
INPAT INPAT_ICD10(O356) Maternal care for (suspected) damage to fetus by radiation 7
INPAT INPAT_ICD10(O431) Malformation of placenta 7
OUTPAT OUTPAT_ICD10(O323) Maternal care for face, brow and chin presentation 7
OUTPAT OUTPAT_ICD10(O357) Maternal care for (suspected) damage to fetus by other medical procedures 7
INPAT INPAT_ICD10(O308) Other multiple gestation 6
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O369) Maternal care for fetal problem, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 6
INPAT INPAT_ICD10(O337) Maternal care for disproportion due to other fetal deformities 5
OUTPAT OUTPAT_ICD10(O337) Maternal care for disproportion due to other fetal deformities 5
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O309) Multiple gestation, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 5
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O350) Maternal care for (suspected) central nervous system malformation in fetus. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 5
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O355) Maternal care for (suspected) damage to fetus by drugs. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 5