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ICD-10-CM · FY 2026 APRIL UPDATE

O43

Placental disorders

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
O43.0Placental transfusion syndromesCategory
O43.01Fetomaternal placental transfusion syndromeCategory
O43.011Fetomaternal placental transfusion syndrome, first trimesterBillable
O43.012Fetomaternal placental transfusion syndrome, second trimesterBillable
O43.013Fetomaternal placental transfusion syndrome, third trimesterBillable
O43.019Fetomaternal placental transfusion syndrome, unspecified trimesterBillable
O43.02Fetus-to-fetus placental transfusion syndromeCategory
O43.021Fetus-to-fetus placental transfusion syndrome, first trimesterBillable
O43.022Fetus-to-fetus placental transfusion syndrome, second trimesterBillable
O43.023Fetus-to-fetus placental transfusion syndrome, third trimesterBillable
O43.029Fetus-to-fetus placental transfusion syndrome, unspecified trimesterBillable
O43.1Malformation of placentaCategory
O43.10Malformation of placenta, unspecifiedCategory
O43.101Malformation of placenta, unspecified, first trimesterBillable
O43.102Malformation of placenta, unspecified, second trimesterBillable
O43.103Malformation of placenta, unspecified, third trimesterBillable
O43.109Malformation of placenta, unspecified, unspecified trimesterBillable
O43.11Circumvallate placentaCategory
O43.111Circumvallate placenta, first trimesterBillable
O43.112Circumvallate placenta, second trimesterBillable
O43.113Circumvallate placenta, third trimesterBillable
O43.119Circumvallate placenta, unspecified trimesterBillable
O43.12Velamentous insertion of umbilical cordCategory
O43.121Velamentous insertion of umbilical cord, first trimesterBillable
O43.122Velamentous insertion of umbilical cord, second trimesterBillable
O43.123Velamentous insertion of umbilical cord, third trimesterBillable
O43.129Velamentous insertion of umbilical cord, unspecified trimesterBillable
O43.19Other malformation of placentaCategory
O43.191Other malformation of placenta, first trimesterBillable
O43.192Other malformation of placenta, second trimesterBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.