2026 ICD-10-CM Diagnosis Code P29.81Cardiac arrest of newborn

ICD-10-CM Codes›P00–P96›P19-P29›P29

ICD-10-CM P29.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P29.81 is a billable ICD-10-CM diagnosis code for cardiac arrest of newborn. 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
P29.81
Billable Status
Yes — Valid for Submission
Code Describes
Cardiac arrest of newborn
Short Description
Cardiac arrest of newborn
Same as the full description in the CMS dataset.
Parent Code
P29.8
Other 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 CodeP29.81Cardiac arrest of newborn

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anoxic encephalopathy
  • Anoxic encephalopathy due to cardiac arrest
  • Asystole
  • Atrial standstill
  • Bradycardic cardiac arrest
  • Cardiac arrest
  • Cardiac arrest with successful resuscitation
  • Cardiorespiratory arrest
  • Circulatory arrest
  • EKG: asystole
  • Hypoxic ischemic encephalopathy
  • Hypoxic ischemic encephalopathy due to cardiac arrest
  • Hypoxic-ischemic coma
  • Idiopathic cardiac arrest
  • Neonatal cardiac arrest
  • Neonatal cardiorespiratory arrest
  • Neonatal dysrhythmia
  • Neonatal respiratory arrest
  • Neonatal respiratory failure
  • Post-cardiorespiratory arrest coma
  • Respiratory arrest
  • Respiratory insufficiency syndrome of newborn
  • Sinus arrest

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.

    • Arrest, arrested
      • cardiac
        • newborn
    • Newborn(infant) (liveborn) (singleton)
      • affected by
        • cardiac arrest

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

Patient EducationClinical

Sudden Cardiac Arrest

Sudden cardiac arrest (SCA) is a condition in which the heart suddenly stops beating. When that happens, blood stops flowing to the brain and other vital organs. If it is not treated, SCA usually causes death within minutes. But quick treatment with a defibrillator may be lifesaving.

The full article covers:

  • What is sudden cardiac arrest (SCA)?
  • How is sudden cardiac arrest (SCA) different from a heart attack?
  • What causes sudden cardiac arrest (SCA)?
  • Who is at risk for sudden cardiac arrest (SCA)?
  • What are the symptoms of sudden cardiac arrest (SCA)?
  • How is sudden cardiac arrest (SCA) diagnosed?
  • What are the treatments for sudden cardiac arrest (SCA)?
  • What should I do if I think that someone has had an SCA?

Read the full article at MedlinePlus

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

Convert P29.81 to ICD-9-CMHistory

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

ICD-9-CM
779.85 NB cardiac arrest
Exact Match The mapping is direct, with no qualifiers.

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 P29.81Overview

Is P29.81 a billable code?

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

What is the ICD-9 equivalent of P29.81?

Under the General Equivalence Mappings, cardiac arrest of newborn converts to ICD-9-CM 779.85 (NB cardiac arrest). The mapping is a direct match.

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.