2026 ICD-10-CM Diagnosis Code P37.2Neonatal (disseminated) listeriosis

ICD-10-CM Codes›P00–P96›P35-P39›P37

ICD-10-CM P37.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P37.2 is a billable ICD-10-CM diagnosis code for neonatal (disseminated) listeriosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as congenital listeriosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Perinatal infections.

Code Identity

ICD-10-CM Code
P37.2
Billable Status
Yes — Valid for Submission
Code Describes
Neonatal (disseminated) listeriosis
Short Description
Neonatal (disseminated) listeriosis
Same as the full description in the CMS dataset.
Parent Code
P37
Other congenital infectious and parasitic diseases

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP35-P39Infections specific to the perinatal period
CategoryP37Other congenital infectious and parasitic diseases
This CodeP37.2Neonatal (disseminated) listeriosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Congenital listeriosis
  • Disseminated infantile listeriosis
  • Food poisoning caused by Listeria monocytogenes
  • Infection caused by Listeria
  • Invasive listeriosis
  • Listeriosis
  • Neonatal disseminated listeriosis

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.

    • Infection, infected, infective(opportunistic)
      • congenital
        • listeriosis (disseminated)
    • Infection, infected, infective(opportunistic)
      • Listeria monocytogenes
        • congenital
    • Listeriosis, listerellosis
      • congenital (disseminated)
    • Listeriosis, listerellosis
      • neonatal, newborn (disseminated)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No
CCSR PNL009
Perinatal infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Listeriosis

    infections with bacteria of the genus listeria.

  • Listeria

    a genus of bacteria which may be found in the feces of animals and man, on vegetation, and in silage. its species are parasitic on cold-blooded and warm-blooded animals, including man.

  • Invasive Listeriosis

    a bacterial infection by listeria monocytogenes in a sterile body compartment.

  • Congenital Listeriosis

    a bacterial infection by listeria monocytogenes that is present at birth.

Patient EducationClinical

Listeria Infections

Listeriosis is a foodborne illness caused by Listeria monocytogenes, bacteria found in soil and water. It can be in a variety of raw foods as well as in processed foods and foods made from unpasteurized milk. Listeria is unlike many other germs because it can grow even in the cold temperature of the refrigerator.

Read the full article at MedlinePlus

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

Convert P37.2 to ICD-9-CMHistory

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

ICD-9-CM
771.2 Congenital infec NEC
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 P37.2Overview

Is P37.2 (Other congenital infectious and parasitic diseases) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report neonatal (disseminated) listeriosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of P37.2?

Under the General Equivalence Mappings, neonatal (disseminated) listeriosis converts to ICD-9-CM 771.2 (congenital infec NEC). 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.