Congenital pneumonia (P23) ICD-10-CM
The P23 code range covers congenital pneumonia with 10 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- infective pneumonia acquired in utero or during birth
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- neonatal pneumonia resulting from aspiration P24
Codes in the P23 Range 10 codes · 9 billable
- P23 Congenital pneumoniaNon-billable
- P23.0 Congenital pneumonia due to viral agent
- P23.1 Congenital pneumonia due to Chlamydia
- P23.2 Congenital pneumonia due to staphylococcus
- P23.3 Congenital pneumonia due to streptococcus, group B
- P23.4 Congenital pneumonia due to Escherichia coli
- P23.5 Congenital pneumonia due to Pseudomonas
- P23.6 Congenital pneumonia due to other bacterial agents
- P23.8 Congenital pneumonia due to other organisms
- P23.9 Congenital pneumonia, unspecified
About the P23 Code Range
The ICD-10 code P23 classifies various types of congenital pneumonia, which are lung infections present at birth. This coding section includes specific subcodes that identify the infectious agent responsible, such as viral or bacterial causes.
These codes are used to accurately document and differentiate congenital pneumonia cases based on their cause. For example, P23.0 covers congenital pneumonia due to viral agents, often referenced as congenital viral pneumonia. Bacterial causes have distinct codes: P23.1 for Chlamydia pneumoniae infections (also called neonatal chlamydial pneumonia), P23.2 for staphylococcal pneumonia, P23.3 for group B streptococcal pneumonia, P23.4 for Escherichia coli pneumonia, and P23.5 for pneumonia caused by Pseudomonas bacteria. Additional bacterial infections fall under P23.6, while P23.8 includes other organisms. If the cause is unclear, P23.9 is used for unspecified congenital pneumonia, sometimes identified simply as neonatal pneumonia. These distinctions help medical professionals ensure proper diagnosis, treatment, and coding accuracy for this serious perinatal condition.
Questions About This Page
How many billable codes are in the P23 range?
Of the 10 codes in this range, 9 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the P23 range classify?
The range classifies congenital pneumonia. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
