2026 ICD-10-CM Diagnosis Code P29.0Neonatal cardiac failure

ICD-10-CM Codes›P00–P96›P19-P29›P29

ICD-10-CM P29.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P29.0 is a billable ICD-10-CM diagnosis code for neonatal cardiac failure. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified perinatal conditions.

Code Identity

ICD-10-CM Code
P29.0
Billable Status
Yes — Valid for Submission
Code Describes
Neonatal cardiac failure
Short Description
Neonatal cardiac failure
Same as the full description in the CMS dataset.
Parent Code
P29
Cardiovascular disorders originating in the perinatal period

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP19-P29Respiratory and cardiovascular disorders specific to the perinatal period
CategoryP29Cardiovascular disorders originating in the perinatal period
This CodeP29.0Neonatal cardiac failure

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute congestive heart failure
  • Acute heart failure
  • Acute left ventricular failure
  • Acute left-sided congestive heart failure
  • Acute left-sided heart failure
  • Acute right-sided congestive heart failure
  • Acute right-sided heart failure
  • Biventricular congestive heart failure
  • Congenital cardiac failure
  • Congestive heart failure
  • Congestive heart failure stage B
  • Congestive heart failure stage C
  • Congestive heart failure stage D
  • Congestive heart failure with right heart failure
  • Disorder confirmed
  • Exacerbation of congestive heart failure
  • Heart failure
  • Heart failure confirmed
  • Heart failure following administration of antineoplastic agent
  • Heart failure with normal ejection fraction
  • Heart failure with reduced ejection fraction
  • Heart failure with reduced ejection fraction due to myocarditis
  • High output heart failure
  • Left heart failure
  • Left ventricular failure with sepsis
  • Low output heart failure
  • Neonatal cardiac failure
  • Neonatal cardiac failure due to decreased left ventricular output
  • Neonatal cardiac failure due to pulmonary overperfusion
  • Pleural effusion due to another disorder
  • Pleural effusion due to congestive heart failure
  • Refractory heart failure
  • Right heart failure secondary to left heart failure
  • Right ventricular failure
  • Right ventricular failure with sepsis
  • Symptomatic congestive heart failure
  • X-linked intellectual disability, cardiomegaly, congestive heart failure syndrome

Tabular List NotesGuidance

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

Code Also

  • associated underlying condition

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.

    • Edema, edematous(infectious) (pitting) (toxic)
      • lung
        • with heart condition or failure
          • newborn
    • Failure, failed
      • heart (acute) (senile) (sudden)
        • congestive
          • newborn
    • Failure, failed
      • heart (acute) (senile) (sudden)
        • newborn
    • Insufficiency, insufficient
      • heart
        • newborn
    • Insufficiency, insufficient
      • myocardial, myocardium (with arteriosclerosis)
        • newborn

Clinical ClassificationClinical

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

CCSR PNL013
Other specified and unspecified perinatal conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Heart Failure

    a heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. heart failure can be caused by structural defects, functional abnormalities (ventricular dysfunction), or a sudden overload beyond its capacity. chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as myocardial infarction.

  • Heart Failure, Diastolic

    heart failure caused by abnormal myocardial relaxation during diastole leading to defective cardiac filling.

  • Heart Failure, Systolic

    heart failure caused by abnormal myocardial contraction during systole leading to defective cardiac emptying.

  • Diastole

    post-systolic relaxation of the heart, especially the heart ventricles.

  • Systole

    period of contraction of the heart, especially of the heart ventricles.

  • Right Ventricular Failure

    failure of proper functioning of the right ventricle, with venous engorgement, hepatic enlargement, and subcutaneous edema.

Patient EducationClinical

Heart Failure

Heart failure means that your heart can't pump enough oxygen-rich blood to meet your body's needs. Heart failure doesn't mean that your heart has stopped or is about to stop beating. But without enough blood flow, your organs may not work well, which can cause serious problems.

The full article covers:

  • What is heart failure?
  • What causes heart failure?
  • Who is more likely to develop heart failure?
  • What are the symptoms of heart failure?
  • What other problems does heart failure cause?
  • How is heart failure diagnosed?
  • What are the treatments for heart failure?
  • Can heart failure be prevented?

Read the full article at MedlinePlus

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

Convert P29.0 to ICD-9-CMHistory

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

ICD-9-CM
779.89 Perinatal condition NEC
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 P29.0Overview

Is P29.0 (Cardiovascular disorders originating in the perinatal period) a billable code?

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

What is the ICD-9 equivalent of P29.0?

Under the General Equivalence Mappings, neonatal cardiac failure converts to ICD-9-CM 779.89 (perinatal condition NEC). 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.