2026 ICD-10-CM Diagnosis Code A32.7Listerial sepsis

ICD-10-CM Codes›A00–B99›A30-A49›A32

ICD-10-CM A32.7
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A32.7 is a billable ICD-10-CM diagnosis code for listerial sepsis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 870 through 872. Coders also document this condition as sepsis caused by Listeria monocytogenes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Septicemia.

Code Identity

ICD-10-CM Code
A32.7
Billable Status
Yes — Valid for Submission
Code Describes
Listerial sepsis
Short Description
Listerial sepsis
Same as the full description in the CMS dataset.
Parent Code
A32
Listeriosis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA30-A49Other bacterial diseases
CategoryA32Listeriosis
This CodeA32.7Listerial sepsis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Sepsis caused by Listeria monocytogenes

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.

    • Sepsis(generalized) (unspecified organism)
      • Listeria monocytogenes

Clinical ClassificationClinical

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

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No
CCSR INF002
Septicemia
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.

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 A32.7 to ICD-9-CMHistory

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

ICD-9-CM
027.0 Listeriosis
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
995.91 Sepsis
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

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 A32.7Overview

Is A32.7 (Listeriosis) a billable code?

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

What MS-DRG does A32.7 group to?

When listerial sepsis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 870, 871, 872, with relative weights from 1.0233 to 6.9118 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A32.7?

Under the General Equivalence Mappings, listerial sepsis converts to ICD-9-CM 027.0 (listeriosis) and 995.91 (sepsis). 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.