2026 ICD-10-CM Diagnosis Code B08.5Enteroviral vesicular pharyngitis

ICD-10-CM Codes›A00–B99›B00-B09›B08

ICD-10-CM B08.5
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B08.5 is a billable ICD-10-CM diagnosis code for enteroviral vesicular pharyngitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 152 through 153. Coders also document this condition as acute viral pharyngitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified upper respiratory infections and Viral infection.

Code Identity

ICD-10-CM Code
B08.5
Billable Status
Yes — Valid for Submission
Code Describes
Enteroviral vesicular pharyngitis
Short Description
Enteroviral vesicular pharyngitis
Same as the full description in the CMS dataset.
Parent Code
B08
Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB00-B09Viral infections characterized by skin and mucous membrane lesions
CategoryB08Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified
This CodeB08.5Enteroviral vesicular pharyngitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute viral pharyngitis
  • Herpangina
  • Vesicular pharyngitis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Herpangina

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.

    • Angina(attack) (cardiac) (chest) (heart) (pectoris) (syndrome) (vasomotor)
      • aphthous
    • Coxsackie(virus) (infection)
      • pharyngitis
    • Herpangina
    • Infection, infected, infective(opportunistic)
      • pharynx
        • coxsackievirus
    • Pharyngitis(acute) (catarrhal)(gangrenous) (infective) (malignant) (membranous) (phlegmonous) (pseudomembranous) (simple) (subacute) (suppurative) (ulcerative) (viral)
      • aphthous
    • Pharyngitis(acute) (catarrhal)(gangrenous) (infective) (malignant) (membranous) (phlegmonous) (pseudomembranous) (simple) (subacute) (suppurative) (ulcerative) (viral)
      • coxsackievirus
    • Pharyngitis(acute) (catarrhal)(gangrenous) (infective) (malignant) (membranous) (phlegmonous) (pseudomembranous) (simple) (subacute) (suppurative) (ulcerative) (viral)
      • enteroviral vesicular
    • Pharyngitis(acute) (catarrhal)(gangrenous) (infective) (malignant) (membranous) (phlegmonous) (pseudomembranous) (simple) (subacute) (suppurative) (ulcerative) (viral)
      • vesicular, enteroviral
    • Sore
      • throat (acute)
        • coxsackie (virus)
    • Sore
      • throat (acute)
        • viral NEC
          • coxsackie
    • Syndrome
      • Zahorsky's
    • Zahorsky's syndrome(herpangina)

Clinical ClassificationClinical

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

CCSR RSP006
Other specified upper respiratory infections
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF008
Viral infection
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Herpangina

    acute types of coxsackievirus infections or echovirus infections that usually affect children during the summer and are characterized by vesiculoulcerative lesions on the mucous membranes of the throat; dysphagia; vomiting, and fever.

Patient EducationClinical

Viral Infections

Viruses are very tiny germs. They are made of genetic material (either DNA or RNA) inside of a protein coating. There are a huge number of viruses on earth. Only a small number of them can infect humans. Those viruses can infect our cells, which may cause disease.

The full article covers:

  • What are viruses?
  • How are viruses spread?
  • How do viruses cause disease?
  • What are the treatments for viral infections?
  • Can viral infections be prevented?

Read the full article at MedlinePlus

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

Convert B08.5 to ICD-9-CMHistory

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

ICD-9-CM
074.0 Herpangina
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 B08.5Overview

Is B08.5 a billable code?

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

What MS-DRG does B08.5 group to?

When enteroviral vesicular pharyngitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 152, 153, with relative weights from 0.7382 to 1.1822 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B08.5?

Under the General Equivalence Mappings, enteroviral vesicular pharyngitis converts to ICD-9-CM 074.0 (herpangina). 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.