2026 ICD-10-CM Diagnosis Code P25.2Pneumomediastinum originating in the perinatal period

ICD-10-CM Codes›P00–P96›P19-P29›P25

ICD-10-CM P25.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P25.2 is a billable ICD-10-CM diagnosis code for pneumomediastinum originating in the perinatal period. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as air leaking from lung. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Respiratory perinatal condition.

Code Identity

ICD-10-CM Code
P25.2
Billable Status
Yes — Valid for Submission
Code Describes
Pneumomediastinum originating in the perinatal period
Short Description
Pneumomediastinum originating in the perinatal period
Same as the full description in the CMS dataset.
Parent Code
P25
Interstitial emphysema and related conditions 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
CategoryP25Interstitial emphysema and related conditions originating in the perinatal period
This CodeP25.2Pneumomediastinum originating in the perinatal period

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Air leaking from lung
  • Mediastinal emphysema
  • Neonatal pneumomediastinum
  • Neonatal pulmonary air leak
  • Perinatal pneumomediastinum
  • Tension pneumomediastinum

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.

    • Emphysema(atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular)
      • mediastinal
        • newborn
    • Pneumomediastinum
      • congenital or perinatal

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

  • Mediastinal Emphysema

    presence of air in the mediastinal tissues due to leakage of air from the tracheobronchial tree, usually as a result of trauma.

Patient EducationClinical

Chest Injuries and Disorders

The chest is the part of your body between your neck and your abdomen (belly). The medical term for your chest is thorax.

The full article covers:

  • What is the chest?
  • What are chest injuries and disorders?
  • How are chest injuries and disorders diagnosed?

Read the full article at MedlinePlus

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

Convert P25.2 to ICD-9-CMHistory

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

ICD-9-CM
770.2 NB interstit emphysema
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 P25.2Overview

Is P25.2 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report pneumomediastinum originating in the perinatal period on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of P25.2?

Under the General Equivalence Mappings, pneumomediastinum originating in the perinatal period converts to ICD-9-CM 770.2 (NB interstit emphysema). 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.