2026 ICD-10-CM Diagnosis Code P23.0Congenital pneumonia due to viral agent
ICD-10-CM Codes›P00–P96›P19-P29›P23
- Billable — Valid for Submission
- Not Chronic
P23.0 is a billable ICD-10-CM diagnosis code for congenital pneumonia due to viral agent. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as congenital pneumonia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Perinatal infections, Respiratory perinatal condition, and Viral infection.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Congenital pneumonia
- Congenital viral pneumonia
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Use Additional Code
- code B97
Type 1 Excludes
- congenital rubella pneumonitis P35.0
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
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.
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.
- Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
- congenital (infective)
- due to
- viral agent
- Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
- viral, virus (broncho) (interstitial) (lobar)
- congenital
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Convert P23.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About P23.0Overview
Is P23.0 (Congenital pneumonia) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report congenital pneumonia due to viral agent on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What is the ICD-9 equivalent of P23.0?
Under the General Equivalence Mappings, congenital pneumonia due to viral agent converts to ICD-9-CM 770.0 (congenital pneumonia). 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.
