2026 ICD-10-CM Diagnosis Code B00.0Eczema herpeticum

ICD-10-CM Codes›A00–B99›B00-B09›B00

ICD-10-CM B00.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B00.0 is a billable ICD-10-CM diagnosis code for eczema herpeticum. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607, 974 through 976. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified skin disorders and Viral infection.

Code Identity

ICD-10-CM Code
B00.0
Billable Status
Yes — Valid for Submission
Code Describes
Eczema herpeticum
Short Description
Eczema herpeticum
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 CodeB00.0Eczema herpeticum

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Eczema herpeticum
  • Eczema vaccinatum
  • Kaposi's varicelliform eruption caused by Vaccinia virus
  • Vaccinia
  • Vesicular eruption

Tabular List NotesGuidance

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

Inclusion Terms

  • Kaposi's varicelliform eruption

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.

    • Eczema(acute) (chronic) (erythematous) (fissum) (rubrum) (squamous)
      • herpeticum
    • Eruption
      • Kaposi's varicelliform
    • Eruption
      • skin (nonspecific)
        • Kaposi's varicelliform
    • Kaposi's
      • varicelliform eruption

Clinical ClassificationClinical

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

CCSR SKN007
Other specified and unspecified skin disorders
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF008
Viral infection
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Dual Specificity Phosphatase 3

    a dual specificity phosphatase subtype that plays a role in intracellular signal transduction by inactivating mitogen-activated protein kinases. it has specificity for extracellular signal-regulated map kinases.

  • Smallpox Vaccine

    a vaccinia virus vaccine used for immunization against smallpox. it is now recommended only for laboratory workers exposed to smallpox virus. certain countries continue to vaccinate those in the military service. rare complications most often associated with older generation smallpox vaccines include vaccinia, secondary bacterial infections, and encephalomyelitis. because monkeypox virus and smallpox virus are both orthopoxvirus and are closely related smallpox vaccines provide effective cross-protection against mpox, monkeypox (https://www.cdc.gov/poxvirus/monkeypox/clinicians/smallpox-vaccine.html).

  • Vaccinia

    the cutaneous and occasional systemic reactions associated with vaccination using smallpox (variola) vaccine.

  • Vaccinia virus

    the type species of orthopoxvirus, related to cowpox virus, but whose true origin is unknown. it has been used as a live vaccine against smallpox. it is also used as a vector for inserting foreign dna into animals. rabbitpox virus is a subspecies of vaccinia virus.

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 B00.0 to ICD-9-CMHistory

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

ICD-9-CM
054.0 Eczema herpeticum
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 B00.0Overview

Is B00.0 (Herpesviral [herpes simplex] infections) a billable code?

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

What MS-DRG does B00.0 group to?

When eczema herpeticum is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, 974, 975, 976, with relative weights from 0.8945 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B00.0?

Under the General Equivalence Mappings, eczema herpeticum converts to ICD-9-CM 054.0 (eczema herpeticum). 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.