B00.4
BillableHerpesviral encephalitis
B00.4 is the ICD-10-CM code for Herpesviral encephalitis. It is a billable, specific code valid for reimbursement.
A00-B99 Certain infectious and parasitic diseases
What this means — in plain language
MedlinePlus · NIHWhat is encephalitis? Encephalitis is inflammation (swelling) of the brain. It can happen when an infection or medical condition that affects the brain activates your immune system. The inflammation can cause a wide range of symptoms. In extreme cases, it can lead to brain damage, stroke , or even death. What causes encephalitis? There are different types of encephalitis, based on what the cause is. The two main…
Read more about Encephalitis at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •Herpesviral meningoencephalitis
- •Simian B disease
Excludes1 — not coded here
Medications indicated for this condition
FDA labeling- AcyclovirHerpes Simplex Virus Nucleoside Analog DNA Polymerase Inhibitor [EPC]›
- Foscarnet›
- Valacyclovir›
- PenciclovirHerpesvirus Nucleoside Analog DNA Polymerase Inhibitor [EPC]›
- FamciclovirHerpes Simplex Virus Nucleoside Analog DNA Polymerase Inhibitor [EPC]›
- Acyclovir and HydrocortisoneHerpes Simplex Virus Nucleoside Analog DNA Polymerase Inhibitor [EPC]›
- Human Vaccinia Immune GlobulinHuman Immunoglobulin G [EPC]›
- TrifluridineNucleoside Analog Antiviral [EPC]›
Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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