2026 ICD-10-CM Diagnosis Code A88.1Epidemic vertigo

ICD-10-CM Codes›A00–B99›A80-A89›A88

ICD-10-CM A88.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A88.1 is a billable ICD-10-CM diagnosis code for epidemic vertigo. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as dysfunction of vestibular system. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified CNS infection and poliomyelitis and Viral infection.

Code Identity

ICD-10-CM Code
A88.1
Billable Status
Yes — Valid for Submission
Code Describes
Epidemic vertigo
Short Description
Epidemic vertigo
Same as the full description in the CMS dataset.
Parent Code
A88
Other viral infections of central nervous system, not elsewhere classified

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA80-A89Viral and prion infections of the central nervous system
CategoryA88Other viral infections of central nervous system, not elsewhere classified
This CodeA88.1Epidemic vertigo

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Dysfunction of vestibular system
  • Epidemic vertigo
  • Viral epidemic vertigo

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.

    • Vertigo
      • epidemic

Clinical ClassificationClinical

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

CCSR NVS003
Other specified CNS infection and poliomyelitis
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF008
Viral infection
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Dizziness and Vertigo

When you're dizzy, you may feel lightheaded, woozy, or disoriented. If you feel like you or the room are spinning, you have vertigo. These feelings may make you lose your balance.

Read the full article at MedlinePlus

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

Convert A88.1 to ICD-9-CMHistory

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

ICD-9-CM
078.81 Epidemic vertigo
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A88.1Overview

Is A88.1 a billable code?

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

What is the ICD-9 equivalent of A88.1?

Under the General Equivalence Mappings, epidemic vertigo converts to ICD-9-CM 078.81 (epidemic vertigo). The mapping is a direct match.

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.