2026 ICD-10-CM Diagnosis Code O43Placental disorders

ICD-10-CM Codes›O00-O9A›O30-O48›O43

ICD-10-CM O43
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O43 is a non-billable ICD-10-CM category code for placental disorders, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O43.011, O43.012, O43.013, and O43.019.

Code Identity

ICD-10-CM Code
O43
Billable Status
No — Non-Billable Category
Code Describes
Placental disorders
Chapter
O30-O48
Maternal care related to the fetus and amniotic cavity and possible delivery problems

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
CategoryO43Placental disorders
This CodeO43Placental disorders

Specific Coding for Placental disordersOverview

Non-specific codes like O43 require more characters. Use one of these billable codes instead:

  • O43.0 for Placental transfusion syndromes

  • O43.01 for Fetomaternal placental transfusion syndrome

  • O43.02 for Fetus-to-fetus placental transfusion syndrome

  • O43.1 for Malformation of placenta

  • O43.10 for Malformation of placenta, unspecified

  • O43.11 for Circumvallate placenta

  • O43.12 for Velamentous insertion of umbilical cord

  • O43.19 for Other malformation of placenta

  • O43.2 for Morbidly adherent placenta

  • O43.21 for Placenta accreta

  • O43.22 for Placenta increta

  • O43.23 for Placenta percreta

  • O43.8 for Other placental disorders

  • O43.81 for Placental infarction

  • O43.89 for Other placental disorders

  • O43.9 for Unspecified placental disorder

  • Use O43.90 for Unspecified placental disorder, unspecified trimester

  • Use O43.91 for Unspecified placental disorder, first trimester

  • Use O43.92 for Unspecified placental disorder, second trimester

  • Use O43.93 for Unspecified placental disorder, third trimester

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 2 Excludes

  • maternal care for poor fetal growth due to placental insufficiency O36.5
  • placenta previa O44
  • placental polyp O90.89
  • placentitis O41.14
  • premature separation of placenta abruptio placentae O45

Patient EducationClinical

Health Problems in Pregnancy

A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.

The full article covers:

  • What are health problems in pregnancy?
  • What raises my risk for health problems during pregnancy?
  • Can chronic health conditions cause problems in pregnancy?
  • Can health problems in pregnancy be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O43Overview

Is O43 (Placental disorders) a billable code?

No. This is a category header that groups the codes for placental disorders, and headers cannot be submitted on claims. Claims for placental disorders need a more specific code from this category, such as O43.011, O43.012, and O43.013.