2027 ICD-10-CM Diagnosis Code A92.32West Nile virus infection with other neurologic manifestation

ICD-10-CM Codes›A00–B99›A90-A99›A92

ICD-10-CM A92.32
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A92.32 is a billable ICD-10-CM diagnosis code for West Nile virus infection with other neurologic manifestation. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 865 through 866. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 131 closely related codes. Coders also document this condition as disease caused by West Nile virus. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Viral infection.

Code Identity

ICD-10-CM Code
A92.32
Billable Status
Yes — Valid for Submission
Code Describes
West Nile virus infection with other neurologic manifestation
Short Description
West Nile virus infection with oth neurologic manifestation
Parent Code
A92.3
West Nile virus infection

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA90-A99Arthropod-borne viral fevers and viral hemorrhagic fevers
CategoryA92Other mosquito-borne viral fevers
This CodeA92.32West Nile virus infection with other neurologic manifestation

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disease caused by West Nile virus
  • Disorder of nervous system caused by West Nile virus
  • Meningitis caused by West Nile virus

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A92.32: its own notes plus those printed at A92 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 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 A92 Other mosquito-borne viral fevers applies to 11 codes
  • Ross River disease (B33.1)

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.

On A92.32 itself
  • code to specify the neurologic manifestation
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 A92.32, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming A92.32: its condition is not part of those codes, and both may be reported when the patient has both.

  • A83 Mosquito-borne viral encephalitis
    West Nile fever (A92.3-) names A92.3-, which includes this code
  • A83 Mosquito-borne viral encephalitis
    West Nile virus (A92.3-) names A92.3-, 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 INF008
Viral infection
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • West Nile Fever

    a mosquito-borne viral illness caused by the west nile virus, a flavivirus and endemic to regions of africa, asia, and europe. common clinical features include headache; fever; maculopapular rash; gastrointestinal symptoms; and lymphadenopathy. meningitis; encephalitis; and myelitis may also occur. the disease may occasionally be fatal or leave survivors with residual neurologic deficits. (from joynt, clinical neurology, 1996, ch26, p13; lancet 1998 sep 5;352(9130):767-71)

Patient EducationClinical

Neurologic Diseases

The brain, spinal cord, and nerves make up the nervous system. Together they control all the workings of the body. When something goes wrong with a part of your nervous system, you can have trouble moving, speaking, swallowing, breathing, or learning. You can also have problems with your memory, senses, or mood.

Read the full article at MedlinePlus

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

Convert A92.32 to ICD-9-CMHistory

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

ICD-9-CM
066.42 West Nile neuro man NEC
Exact Match The mapping is direct, with no qualifiers.

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 A92.32Overview

What is the ICD-10 code for West Nile virus infection with other neurologic manifestation?

The ICD-10-CM code for West Nile virus infection with other neurologic manifestation is A92.32 (sometimes written as A9232). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is A92.32 (West Nile virus infection) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report West Nile virus infection with other neurologic manifestation on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does A92.32 group to?

When West Nile virus infection with other neurologic manifestation is the principal diagnosis on an inpatient stay, it groups to MS-DRG 866, 865, with relative weights from 0.8691 to 1.3153 depending on complications. Higher weights mean higher Medicare reimbursement.

Is A92.32 a CC or MCC?

CMS lists A92.32 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 131 closely related codes in its exclusion list.

Can A92.32 be reported with B33.1?

Not as a rule. The Excludes1 note at A92, which applies to A92.32, lists "Ross River disease (B33.1)". 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).