Herpesviral [herpes simplex] infections (B00) ICD-10-CM
The B00 code range covers herpesviral [herpes simplex] infections with 18 ICD-10-CM diagnosis codes. 15 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- congenital herpesviral infections P35.2
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the B00 Range 18 codes · 15 billable
- B00 Herpesviral [herpes simplex] infectionsNon-billable
- B00.0 Eczema herpeticum
- B00.1 Herpesviral vesicular dermatitis
- B00.2 Herpesviral gingivostomatitis and pharyngotonsillitis
- B00.3 Herpesviral meningitis
- B00.4 Herpesviral encephalitis
- B00.5 Herpesviral ocular diseaseNon-billable
- B00.50 Herpesviral ocular disease, unspecified
- B00.51 Herpesviral iridocyclitis
- B00.52 Herpesviral keratitis
- B00.53 Herpesviral conjunctivitis
- B00.59 Other herpesviral disease of eye
- B00.7 Disseminated herpesviral disease
- B00.8 Other forms of herpesviral infectionsNon-billable
- B00.81 Herpesviral hepatitis
- B00.82 Herpes simplex myelitis
- B00.89 Other herpesviral infection
- B00.9 Herpesviral infection, unspecified
About the B00 Code Range
Herpes simplex infections can involve the skin and moist body linings, including the mouth. This category also includes infections affecting the eyes, nervous system, and liver.
The subdivisions separate skin, mouth and throat, nervous system, eye, and liver conditions, along with widespread and unspecified infections. Eye disease under B00.5 splits into named eye conditions, other eye disease, and unspecified eye disease. Other forms under B00.8 distinguish liver disease, spinal cord disease, and other herpesviral infections.
Questions About This Page
How many billable codes are in the B00 range?
Of the 18 codes in this range, 15 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the B00 range classify?
The range classifies herpesviral [herpes simplex] infections. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
