2026 ICD-10-CM Diagnosis Code O90.3Peripartum cardiomyopathy

ICD-10-CM Codes›O00-O9A›O85-O92›O90

ICD-10-CM O90.3
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O90.3 is a billable ICD-10-CM diagnosis code for peripartum cardiomyopathy. 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). Coders also document this condition as dilated peripartum cardiomyopathy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Myocarditis and cardiomyopathy and Other specified complications in pregnancy.

Code Identity

ICD-10-CM Code
O90.3
Billable Status
Yes — Valid for Submission
Code Describes
Peripartum cardiomyopathy
Short Description
Peripartum cardiomyopathy
Same as the full description in the CMS dataset.
Parent Code
O90
Complications of the puerperium, not elsewhere classified

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO85-O92Complications predominantly related to the puerperium
CategoryO90Complications of the puerperium, not elsewhere classified
This CodeO90.3Peripartum cardiomyopathy

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O90.3.

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).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Dilated peripartum cardiomyopathy
  • Heart disease in mother complicating pregnancy, childbirth AND/OR puerperium
  • Postpartum cardiomyopathy

Tabular List NotesGuidance

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

Inclusion Terms

  • Conditions in I42

Type 1 Excludes

  • pre-existing heart disease complicating pregnancy and the puerperium O99.4

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Cardiomyopathy(familial) (idiopathic)
      • peripartum
    • Cardiomyopathy(familial) (idiopathic)
      • postpartum
    • Failure, failed
      • heart (acute) (senile) (sudden)
        • peripartum
    • Peripartum
      • cardiomyopathy
    • Puerperal, puerperium(complicated by, complications)
      • cardiomyopathy

Clinical ClassificationClinical

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

CCSR CIR005
Myocarditis and cardiomyopathy
Default principal diagnosis: inpatient No · outpatient No
CCSR PRG028
Other specified complications in pregnancy
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Peripartum Cardiomyopathy

    a rare form of dilated cardiomyopathy which causes heart enlargement and weakness during the last month of pregnancy or within five months of delivery.

Patient EducationClinical

Cardiomyopathy

Cardiomyopathy is the name for diseases of the heart muscle. These diseases enlarge your heart muscle or make it thicker and more rigid than normal. In rare cases, scar tissue replaces the muscle tissue.

Read the full article at MedlinePlus

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

Convert O90.3 to ICD-9-CMHistory

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

ICD-9-CM
674.52 Peripart card del w p/p
Approximate The match is approximate rather than exact.
ICD-9-CM
674.54 Peripartum card-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 O90.3Overview

Is O90.3 (Complications of the puerperium, not elsewhere classified) a billable code?

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

Who can O90.3 be reported for?

The Medicare Code Editor checks peripartum cardiomyopathy 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 O90.3?

Under the General Equivalence Mappings, peripartum cardiomyopathy converts to ICD-9-CM 674.52 (peripart card del w p/p) and 674.54 (peripartum card-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.