2027 ICD-10-CM Diagnosis Code P29.12Neonatal bradycardia

ICD-10-CM Codes›P00–P96›P19-P29›P29

ICD-10-CM P29.12
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

P29.12 is a billable ICD-10-CM diagnosis code for neonatal bradycardia. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 794. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified perinatal conditions.

This medical diagnosis code is frequently used in Cardiology medical specialties to designate conditions such abnormalities of heart rhythm.

Code Identity

ICD-10-CM Code
P29.12
Billable Status
Yes — Valid for Submission
Code Describes
Neonatal bradycardia
Short Description
Neonatal bradycardia
Same as the full description in the CMS dataset.
Parent Code
P29.1
Neonatal cardiac dysrhythmia

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 CodeP29.12Neonatal bradycardia

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal pulse rate
  • Asymptomatic bradycardia
  • AV-junctional bradycardia
  • Borderline slow pulse
  • Bradycardia
  • Bradycardic cardiac arrest
  • Drug-induced bradycardia
  • Finding of pulse rate
  • Neonatal bradycardia
  • Neonatal dysrhythmia
  • Persistent sinus bradycardia
  • Pulse slow
  • Reflex bradycardia
  • Severe sinus bradycardia
  • Sinus bradycardia
  • Sinus bradycardia caused by drug
  • Stable bradyarrhythmia
  • Symptomatic sinus bradycardia
  • Vagal autonomic bradycardia

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to P29.12: its own notes plus those printed at P29 and Chapter 16. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later

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.

From P29 Cardiovascular disorders originating in the perinatal period applies to 10 codes
  • congenital malformations of the circulatory system (Q20-Q28)
From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • tetanus neonatorum (A33)

Notes

General instructions on how these codes are used.

From Chapter 16 (P00-P96) Certain conditions originating in the perinatal period applies to 463 codes
  • Codes from this chapter are for use on newborn records only, never on maternal records

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name P29.12, its category, or a range that includes it.

Excludes1 5

These codes carry an Excludes1 note naming P29.12: they are not reported together with it, unless the two conditions are unrelated.

  • R00.1 Bradycardia, unspecified
    neonatal bradycardia (P29.12)
  • Z03.83 Encounter for observation for suspected conditions related to home physiologic monitoring device ruled out
    neonatal bradycardia (P29.12)
  • Z05.81 Observation and evaluation of newborn for suspected condition related to home physiologic monitoring device ruled out
    neonatal bradycardia (P29.12)
  • P03.81 Newborn affected by abnormality in fetal (intrauterine) heart rate or rhythm
    neonatal cardiac dysrhythmia (P29.1-) names P29.1-, which includes this code
  • R00 Abnormalities of heart beat
    abnormalities originating in the perinatal period (P29.1-) names P29.1-, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming P29.12: its condition is not part of those codes, and both may be reported when the patient has both.

  • I49 Other cardiac arrhythmias
    neonatal dysrhythmia (P29.1-) names P29.1-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

Arrhythmia

An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias.

The full article covers:

  • What is an arrhythmia?
  • What causes an arrhythmia?
  • What are the symptoms of an arrhythmia?
  • How is an arrhythmia diagnosed?
  • What are the treatments for an arrhythmia?
  • Can arrhythmias be prevented?

Read the full article at MedlinePlus

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

Convert P29.12 to ICD-9-CMHistory

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

ICD-9-CM
779.81 Neonatal bradycardia
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About P29.12Overview

What is the ICD-10 code for neonatal bradycardia?

The ICD-10-CM code for neonatal bradycardia is P29.12 (sometimes written as P2912). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is P29.12 (Neonatal cardiac dysrhythmia) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report neonatal bradycardia on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does P29.12 group to?

When neonatal bradycardia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 794 (neonate with Other Significant Problems), which carries a relative weight of 1.4934. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of P29.12?

Under the General Equivalence Mappings, neonatal bradycardia converts to ICD-9-CM 779.81 (neonatal bradycardia). The mapping is a direct match.