ICD-10-CM › A00-B99 › B00-B09 › B00 Herpesviral [herpes simplex] infections › B00.4
Herpesviral encephalitis
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Herpesviral encephalitis
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from B00 Herpesviral [herpes simplex] infections
Excludes1 - never coded here
- congenital herpesviral infections (P35.2)
Excludes2 - not included here
- anogenital herpesviral infection (A60.-)
- gammaherpesviral mononucleosis (B27.0-)
- herpangina (B08.5)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Myelitis
- Phrenitis
- Cephalitis
- Cerebritis
- Ependymitis
- Herpesvirus
- Cerebellitis
- Fever > brain
- Ventriculitis
- Febris, febrile
- Meningomyelitis
- Mesencephalitis
- Myelomeningitis
- Parencephalitis
- Syringomyelitis
- Fever > cerebral
- Fever > herpetic
- Radiculomyelitis
- Encephalomyelitis
- Meningocerebritis
- Myeloencephalitis
- Encephalomeningitis
- Human > herpesvirus
- Meningoencephalitis
- Meningomyeloneuritis
- Encephalomeningomyelitis
- Encephalomyelomeningitis
- Meningoencephalomyelitis
- Poliomeningoencephalitis
- Fever > viral hemorrhagic
- Myelopathy > in > infection
- Disease, diseased > cerebral
- Syndrome > acquired immunodeficiency
- Virus, viral > human immunodeficiency
- Infection, infected, infective > brain
- Syndrome > immunodeficiency > acquired
- Infection, infected, infective > herpes
- Disease, diseased > brain > inflammatory
- Disease, diseased > cerebellar, cerebellum
- Inflammation, inflamed, inflammatory > brain
Showing 40 of 51 index phrases.
Codes in the same group
| Code | Description | Status |
|---|---|---|
| B00.0 | Eczema herpeticum | Valid |
| B00.1 | Herpesviral vesicular dermatitis | Valid |
| B00.2 | Herpesviral gingivostomatitis and pharyngotonsillitis | Valid |
| B00.3 | Herpesviral meningitis | Valid |
| B00.5 | Herpesviral ocular disease | Not billable |
| B00.7 | Disseminated herpesviral disease | Valid |
| B00.8 | Other forms of herpesviral infections | Not billable |
| B00.9 | Herpesviral infection, unspecified | Valid |