2026 ICD-10-CM Diagnosis Code O43.212Placenta accreta, second trimester

ICD-10-CM Codes›O00-O9A›O30-O48›O43

ICD-10-CM O43.212
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O43.212 is a billable ICD-10-CM diagnosis code for placenta accreta, second trimester. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Maternal care related to disorders of the placenta and placental implantation.

Code Identity

ICD-10-CM Code
O43.212
Billable Status
Yes — Valid for Submission
Code Describes
Placenta accreta, second trimester
Short Description
Placenta accreta, second trimester
Same as the full description in the CMS dataset.
Parent Code
O43.21
Placenta accreta

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 CodeO43.212Placenta accreta, second trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O43.212.

Maternity diagnoses
The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PRG018
Maternal care related to disorders of the placenta and placental implantation
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Placenta Accreta

    abnormal placentation in which all or parts of the placenta are attached directly to the myometrium due to a complete or partial absence of decidua. it is associated with postpartum hemorrhage because of the failure of placental separation.

  • Placenta Accreta

    the clinical condition in which any part of the placenta invades and is inseparable from the uterine wall. (revitalize)

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.

Convert O43.212 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
667.02 Retnd plac NOS-del w p/p
Approximate The match is approximate rather than exact.
ICD-9-CM
667.04 Retain plac NOS-postpart
Approximate The match is approximate rather than exact.

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 O43.212Overview

Is O43.212 (Placenta accreta) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report placenta accreta, second trimester on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Who can O43.212 be reported for?

The Medicare Code Editor checks placenta accreta, second trimester against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of O43.212?

Under the General Equivalence Mappings, placenta accreta, second trimester converts to ICD-9-CM 667.02 (retnd plac NOS-del w p/p) and 667.04 (retain plac NOS-postpart). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.