2027 ICD-10-CM Diagnosis Code B00Herpesviral [herpes simplex] infections

ICD-10-CM Codes›A00–B99›B00-B09›B00

ICD-10-CM B00
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

B00 is a non-billable ICD-10-CM category code for herpesviral [herpes simplex] infections, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B00.0, B00.1, B00.2, and B00.3.

Code Identity

ICD-10-CM Code
B00
Billable Status
No — Non-Billable Category
Code Describes
Herpesviral [herpes simplex] infections
Short Description
Herpesviral [herpes simplex] infections
Same as the full description in the CMS dataset.
Chapter
B00-B09
Viral infections characterized by skin and mucous membrane lesions

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB00-B09Viral infections characterized by skin and mucous membrane lesions
CategoryB00Herpesviral [herpes simplex] infections
This CodeB00Herpesviral [herpes simplex] infections

Specific Coding for Herpesviral [herpes simplex] infectionsOverview

Non-specific codes like B00 require more characters. Use one of these billable codes instead:

  • Use B00.0 for Eczema herpeticum

  • Use B00.1 for Herpesviral vesicular dermatitis

  • Use B00.2 for Herpesviral gingivostomatitis and pharyngotonsillitis

  • Use B00.3 for Herpesviral meningitis

  • Use B00.4 for Herpesviral encephalitis

  • B00.5 for Herpesviral ocular disease

  • Use B00.50 for Herpesviral ocular disease, unspecified

  • Use B00.51 for Herpesviral iridocyclitis

  • Use B00.52 for Herpesviral keratitis

  • Use B00.53 for Herpesviral conjunctivitis

  • Use B00.59 for Other herpesviral disease of eye

  • Use B00.7 for Disseminated herpesviral disease

  • B00.8 for Other forms of herpesviral infections

  • Use B00.81 for Herpesviral hepatitis

  • Use B00.82 for Herpes simplex myelitis

  • Use B00.89 for Other herpesviral infection

  • Use B00.9 for Herpesviral infection, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B00: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • congenital herpesviral infections (P35.2)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On B00 itself
  • anogenital herpesviral infection (A60.-)
  • gammaherpesviral mononucleosis (B27.0-)
  • herpangina (B08.5)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name B00, its category, or a range that includes it.

Excludes2 3

These codes carry an Excludes2 note naming B00: its condition is not part of those codes, and both may be reported when the patient has both.

  • B10 Other human herpesviruses
    herpes simplex (B00.-)
  • B10 Other human herpesviruses
    human herpesvirus NOS (B00.-)
  • B10 Other human herpesviruses
    human herpesvirus 1 and 2 (B00.-)

Code Also 1

These codes say B00 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • D81.82 Activated Phosphoinositide 3-kinase Delta Syndrome [APDS]
    herpes virus infections (B00.-)

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.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B00Overview

What is the ICD-10 code for herpesviral [herpes simplex] infections?

B00 is the ICD-10-CM category for herpesviral [herpes simplex] infections, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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

No. This is a category header that groups the codes for herpesviral [herpes simplex] infections, and headers cannot be submitted on claims. Claims for herpesviral [herpes simplex] infections need a more specific code from this category, such as B00.0, B00.1, and B00.2.

Can B00 be reported with P35.2?

Not as a rule. The Excludes1 note on B00 lists "congenital herpesviral infections (P35.2)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).