2026 ICD-10-CM Diagnosis Code P23Congenital pneumonia

ICD-10-CM Codes›P00–P96›P19-P29›P23

ICD-10-CM P23
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P23 is a non-billable ICD-10-CM category code for congenital pneumonia, so it cannot be submitted on claims. Use a more specific code from this category instead, such as P23.0, P23.1, P23.2, and P23.3.

Code Identity

ICD-10-CM Code
P23
Billable Status
No — Non-Billable Category
Code Describes
Congenital pneumonia
Chapter
P19-P29
Respiratory and cardiovascular disorders specific to the perinatal period

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP19-P29Respiratory and cardiovascular disorders specific to the perinatal period
CategoryP23Congenital pneumonia
This CodeP23Congenital pneumonia

Specific Coding for Congenital pneumoniaOverview

Non-specific codes like P23 require more characters. Use one of these billable codes instead:

  • Use P23.0 for Congenital pneumonia due to viral agent

  • Use P23.1 for Congenital pneumonia due to Chlamydia

  • Use P23.2 for Congenital pneumonia due to staphylococcus

  • Use P23.3 for Congenital pneumonia due to streptococcus, group B

  • Use P23.4 for Congenital pneumonia due to Escherichia coli

  • Use P23.5 for Congenital pneumonia due to Pseudomonas

  • Use P23.6 for Congenital pneumonia due to other bacterial agents

  • Use P23.8 for Congenital pneumonia due to other organisms

  • Use P23.9 for Congenital pneumonia, unspecified

Tabular List NotesGuidance

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

Includes

  • infective pneumonia acquired in utero or during birth

Type 1 Excludes

  • neonatal pneumonia resulting from aspiration P24

Patient EducationClinical

Pneumonia

Pneumonia is an infection in one or both of your lungs. It causes the air sacs of your lungs to fill up with fluid or pus. Pneumonia can range from mild to severe, depending on what caused it, your age, and your overall health.

The full article covers:

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

Read the full article at MedlinePlus

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

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 P23Overview

Is P23 (Congenital pneumonia) a billable code?

No. This is a category header that groups the codes for congenital pneumonia, and headers cannot be submitted on claims. Claims for congenital pneumonia need a more specific code from this category, such as P23.0, P23.1, and P23.2.