2026 ICD-10-CM Diagnosis Code B00.82Herpes simplex myelitis

ICD-10-CM Codes›A00–B99›B00-B09›B00

ICD-10-CM B00.82
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B00.82 is a billable ICD-10-CM diagnosis code for herpes simplex myelitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as herpes simplex type 1 infection. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Viral infection.

Code Identity

ICD-10-CM Code
B00.82
Billable Status
Yes — Valid for Submission
Code Describes
Herpes simplex myelitis
Short Description
Herpes simplex myelitis
Same as the full description in the CMS dataset.
Parent Code
B00.8
Other forms of herpesviral infections

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB00-B09Viral infections characterized by skin and mucous membrane lesions
CategoryB00Herpesviral [herpes simplex] infections
This CodeB00.82Herpes simplex myelitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Herpes simplex type 1 infection
  • Herpes simplex type 2 infection
  • Myelitis caused by Herpes simplex type 1
  • Myelitis caused by Herpes simplex type 2
  • Myelitis caused by Human herpes simplex virus
  • Myelitis caused by Human herpes virus

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.

    • Herpes, herpesvirus, herpetic
      • simplex
        • myelitis
    • Myelitis(acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute)
      • herpes simplex

Clinical ClassificationClinical

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

CCSR INF008
Viral infection
Default principal diagnosis: inpatient Yes · outpatient Yes

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 B00.82 to ICD-9-CMHistory

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

ICD-9-CM
054.74 Herpes simplex myelitis
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 B00.82Overview

Is B00.82 (Other forms of herpesviral infections) a billable code?

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

What is the ICD-9 equivalent of B00.82?

Under the General Equivalence Mappings, herpes simplex myelitis converts to ICD-9-CM 054.74 (herpes simplex myelitis). 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.