2026 ICD-10-CM Diagnosis Code P28.40Unspecified apnea of newborn

ICD-10-CM Codes›P00–P96›P19-P29›P28

ICD-10-CM P28.40
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P28.40 is a billable ICD-10-CM diagnosis code for unspecified apnea 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 Respiratory perinatal condition.

Code Identity

ICD-10-CM Code
P28.40
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified apnea of newborn
Short Description
Unspecified apnea of newborn
Same as the full description in the CMS dataset.
Parent Code
P28.4
Other apnea of newborn

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP19-P29Respiratory and cardiovascular disorders specific to the perinatal period
CategoryP28Other respiratory conditions originating in the perinatal period
This CodeP28.40Unspecified apnea of newborn

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Apnea
  • Apnea - anesthetic
  • Apnea in newborn
  • Apnea of newborn due to neurological injury
  • Gastroesophageal reflux disease with apnea
  • Infantile apnea
  • Initial apnea
  • Late apnea
  • Neonatal apneic attack
  • Perinatal apneic spells
  • Primary apnea in the newborn
  • Prolonged apnea of newborn
  • Recurrent apnea
  • Recurrent apnea of newborn
  • Traumatic apnea

Tabular List NotesGuidance

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

Inclusion Terms

  • Apnea of newborn, NOS
  • Transient oxygen desaturation spells of newborn

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.

    • Apnea, apneic(of) (spells)
      • newborn
    • Newborn(infant) (liveborn) (singleton)
      • apnea
    • Spells, transient oxygen desaturation of newborn

Clinical ClassificationClinical

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

CCSR PNL006
Respiratory perinatal condition
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Neonatal Apneic Attack

    apnea occurring during the neonatal period.

Code History & ChangesHistory

Replacement P28.40 replaces the following previously assigned code(s):

  • P28.4 - Other apnea of newborn
FY 2023AddedAdded to the ICD-10-CM code setEffective October 1, 2022.
FY 2024–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P28.40Overview

Is P28.40 (Other apnea of newborn) a billable code?

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

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.