2027 ICD-10-CM Diagnosis Code O43Placental disorders

ICD-10-CM Codes›O00-O9A›O30-O48›O43

ICD-10-CM O43
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Placental disorders
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O43: its own notes plus those printed at Chapter 15. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • supervision of normal pregnancy (Z34.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On O43 itself
  • 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.-)
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Notes

General instructions on how these codes are used.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About O43Overview

What is the ICD-10 code for placental disorders?

O43 is the ICD-10-CM category for placental disorders, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.