2027 ICD-10-CM Diagnosis Code A32.11Listerial meningitis

ICD-10-CM Codes›A00–B99›A30-A49›A32

ICD-10-CM A32.11
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A32.11 is a billable ICD-10-CM diagnosis code for listerial meningitis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 867 through 869. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 14 closely related codes. Coders also document this condition as listeria meningitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Meningitis.

Code Identity

ICD-10-CM Code
A32.11
Billable Status
Yes — Valid for Submission
Code Describes
Listerial meningitis
Short Description
Listerial meningitis
Same as the full description in the CMS dataset.
Parent Code
A32.1
Listerial meningitis and meningoencephalitis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA30-A49Other bacterial diseases
CategoryA32Listeriosis
This CodeA32.11Listerial meningitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Listeria meningitis
  • Listeria meningitis caused by Listeria monocytogenes

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A32.11: its own notes plus those printed at A32 and Chapter 1. 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.

From A32 Listeriosis applies to 8 codes
  • listerial foodborne infection
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes1

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

From A32 Listeriosis applies to 8 codes
  • neonatal (disseminated) listeriosis (P37.2)

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 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name A32.11, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming A32.11: they are not reported together with it, unless the two conditions are unrelated.

  • G01 Meningitis in bacterial diseases classified elsewhere
    listeriosis (A32.11)
  • A05 Other bacterial foodborne intoxications, not elsewhere classified
    listeriosis (A32.-) names A32.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No
CCSR NVS001
Meningitis
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Listeriosis

    infections with bacteria of the genus listeria.

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 A32.11 to ICD-9-CMHistory

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

ICD-9-CM
027.0 Listeriosis
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About A32.11Overview

What is the ICD-10 code for listerial meningitis?

The ICD-10-CM code for listerial meningitis is A32.11 (sometimes written as A3211). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is A32.11 (Listerial meningitis and meningoencephalitis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report listerial meningitis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does A32.11 group to?

When listerial meningitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 869, 868, with relative weights from 0.6784 to 2.1855 depending on complications. Higher weights mean higher Medicare reimbursement.

Is A32.11 a CC or MCC?

CMS lists A32.11 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 14 closely related codes in its exclusion list.

Can A32.11 be reported with P37.2?

Not as a rule. The Excludes1 note at A32, which applies to A32.11, lists "neonatal (disseminated) listeriosis (P37.2)". 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).