2026 ICD-10-CM Diagnosis Code B00.2Herpesviral gingivostomatitis and pharyngotonsillitis

ICD-10-CM Codes›A00–B99›B00-B09›B00

ICD-10-CM B00.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B00.2 is a billable ICD-10-CM diagnosis code for herpesviral gingivostomatitis and pharyngotonsillitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 157 through 159, 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Any dental condition including traumatic injury; Caries, periodontitis, and other preventable dental conditions; and Diseases of mouth; excluding dental.

Code Identity

ICD-10-CM Code
B00.2
Billable Status
Yes — Valid for Submission
Code Describes
Herpesviral gingivostomatitis and pharyngotonsillitis
Short Description
Herpesviral gingivostomatitis and pharyngotonsillitis
Same as the full description in the CMS dataset.
Parent Code
B00
Herpesviral [herpes simplex] infections

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB00-B09Viral infections characterized by skin and mucous membrane lesions
CategoryB00Herpesviral [herpes simplex] infections
This CodeB00.2Herpesviral gingivostomatitis and pharyngotonsillitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute herpes simplex pharyngitis
  • Acute herpes zoster pharyngitis
  • Acute viral pharyngitis
  • Allergic contact gingivostomatitis
  • Allergic gingival disease
  • Allergic gingivitis
  • Contact gingivostomatitis
  • Contact mucous membrane inflammation
  • Contact stomatitis
  • Gingival disease caused by virus
  • Gingivostomatitis
  • Herpes zoster infection of oral mucosa
  • Herpetic gingivostomatitis
  • Hypersensitivity gingivitis
  • Irritant contact gingivostomatitis
  • Oral herpes simplex infection
  • Oral mucosal herpes
  • Oral mucosal viral disease
  • Pharyngotonsillitis caused by Human herpes simplex virus
  • Primary herpes simplex
  • Primary oral herpes simplex infection
  • Recurrent oral gingivostomatitis caused by herpes simplex
  • Recurrent oral herpes simplex infection
  • Viral tonsillitis

Tabular List NotesGuidance

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

Inclusion Terms

  • Herpesviral pharyngitis

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.

    • Gingivostomatitis
      • herpesviral
    • Herpes, herpesvirus, herpetic
      • gingivostomatitis
    • Herpes, herpesvirus, herpetic
      • pharyngitis, pharyngotonsillitis
    • Herpes, herpesvirus, herpetic
      • stomatitis
    • Pharyngitis(acute) (catarrhal)(gangrenous) (infective) (malignant) (membranous) (phlegmonous) (pseudomembranous) (simple) (subacute) (suppurative) (ulcerative) (viral)
      • herpesviral
    • Pharyngotonsillitis, herpesviral
    • Sore
      • throat (acute)
        • herpesviral
    • Stomatitis(denture) (ulcerative)
      • herpesviral, herpetic

Clinical ClassificationClinical

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

CCSR DEN001
Any dental condition including traumatic injury
Default principal diagnosis: inpatient No · outpatient No
CCSR DEN003
Caries, periodontitis, and other preventable dental conditions
Default principal diagnosis: inpatient No · outpatient No
CCSR DIG003
Diseases of mouth; excluding dental
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR DEN002
Nontraumatic dental conditions
Default principal diagnosis: inpatient No · outpatient No
CCSR RSP006
Other specified upper respiratory infections
Default principal diagnosis: inpatient No · outpatient No
CCSR INF008
Viral infection
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Herpes Simplex

Herpes is an infection that is caused by a herpes simplex virus (HSV). Oral herpes causes cold sores around the mouth or face. Genital herpes affects the genitals, buttocks or anal area. Genital herpes is a sexually transmitted infection (STI). It affects the genitals, buttocks or anal area.

Read the full article at MedlinePlus

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

Convert B00.2 to ICD-9-CMHistory

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

ICD-9-CM
054.2 Herpetic gingivostomat
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 B00.2Overview

Is B00.2 (Herpesviral [herpes simplex] infections) a billable code?

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

What MS-DRG does B00.2 group to?

When herpesviral gingivostomatitis and pharyngotonsillitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 157, 158, 159, 974, 975, 976, with relative weights from 0.7085 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B00.2?

Under the General Equivalence Mappings, herpesviral gingivostomatitis and pharyngotonsillitis converts to ICD-9-CM 054.2 (herpetic gingivostomat). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.