2027 ICD-10-CM Diagnosis Code P23Congenital pneumonia

ICD-10-CM Codes›P00–P96›P19-P29›P23

ICD-10-CM P23
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Congenital pneumonia
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to P23: its own notes plus those printed at 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.

On P23 itself
  • infective pneumonia acquired in utero or during birth
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

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • neonatal pneumonia resulting from aspiration (P24.-)

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 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 P23, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming P23: they are not reported together with it, unless the two conditions are unrelated.

  • J15 Bacterial pneumonia, not elsewhere classified
    congenital pneumonia (P23.-)
  • J16 Pneumonia due to other infectious organisms, not elsewhere classified
    congenital pneumonia (P23.-)

Excludes2 1

These codes carry an Excludes2 note naming P23: its condition is not part of those codes, and both may be reported when the patient has both.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About P23Overview

What is the ICD-10 code for congenital pneumonia?

P23 is the ICD-10-CM category for congenital pneumonia, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can P23 be reported with a code from P24?

Not as a rule. The Excludes1 note on P23 lists "neonatal pneumonia resulting from aspiration (P24.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).