2027 ICD-10-CM Diagnosis Code A92.2Venezuelan equine fever

ICD-10-CM Codes›A00–B99›A90-A99›A92

ICD-10-CM A92.2
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

A92.2 is a billable ICD-10-CM diagnosis code for Venezuelan equine fever. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 23 through 24, 97 through 99. 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 186 closely related codes. Coders also document this condition as disease caused by Alphavirus. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Encephalitis and Viral infection.

Code Identity

ICD-10-CM Code
A92.2
Billable Status
Yes — Valid for Submission
Code Describes
Venezuelan equine fever
Short Description
Venezuelan equine fever
Same as the full description in the CMS dataset.
Parent Code
A92
Other mosquito-borne viral fevers

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA90-A99Arthropod-borne viral fevers and viral hemorrhagic fevers
CategoryA92Other mosquito-borne viral fevers
This CodeA92.2Venezuelan equine fever

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disease caused by Alphavirus
  • Disorder caused by Venezuelan equine encephalitis virus
  • Encephalitis caused by Alphavirus
  • Encephalitis caused by Venezuelan equine encephalomyelitis virus
  • Invasive viral infectious disease
  • Neuroinvasive Venezuelan equine encephalitis virus infection
  • Venezuelan equine encephalitis virus non-neuroinvasive disease

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A92.2: 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

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Venezuelan equine encephalitis
  • Venezuelan equine encephalomyelitis virus disease

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.

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 A92.2, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming A92.2: its condition is not part of those codes, and both may be reported when the patient has both.

  • A83 Mosquito-borne viral encephalitis
    Venezuelan equine encephalitis (A92.2)

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 NVS002
Encephalitis
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF008
Viral infection
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Venezuelan Equine Fever

    a condition caused by infection by the venezuelan equine encephalitis virus, which is characterized by headache, fever, myalgia, nausea, and vomiting.

Patient EducationClinical

Encephalitis

Encephalitis is inflammation (swelling) of the brain. It can happen when an infection or medical condition that affects the brain activates your immune system. The inflammation can cause a wide range of symptoms. In extreme cases, it can lead to brain damage, stroke, or even death.

The full article covers:

  • What is encephalitis?
  • What causes encephalitis?
  • Who is more likely to get encephalitis?
  • What are the symptoms of encephalitis?
  • How is encephalitis diagnosed?
  • What are the treatments for encephalitis?
  • Can encephalitis be prevented?

Read the full article at MedlinePlus

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

Convert A92.2 to ICD-9-CMHistory

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

ICD-9-CM
066.2 Venezuelan equine fever
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 A92.2Overview

What is the ICD-10 code for Venezuelan equine fever?

The ICD-10-CM code for Venezuelan equine fever is A92.2 (sometimes written as A922). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is A92.2 (Other mosquito-borne viral fevers) a billable code?

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

What MS-DRG does A92.2 group to?

When Venezuelan equine fever is the principal diagnosis on an inpatient stay, it groups to MS-DRG 24, 98, 99, 23, 97, with relative weights from 1.5249 to 5.7422 depending on complications. Higher weights mean higher Medicare reimbursement.

Is A92.2 a CC or MCC?

CMS lists A92.2 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 186 closely related codes in its exclusion list.

Can A92.2 be reported with B33.1?

Not as a rule. The Excludes1 note at A92, which applies to A92.2, 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).