B00.4
B00.4: Herpesviral encephalitis
Billable / specific codeICD-10-CM
B00.4 is a billable, specific ICD-10-CM code for herpesviral encephalitis. It is valid for submission on a claim.
Check B00.4 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Herpesviral meningoencephalitis
- Simian B disease
Excludes1 inherited from the categories above B00.4
A category’s note binds every code beneath it.
Excludes2 inherited from the categories above B00.4
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with B00.4
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
B00.4 is named in 8 Medicare coverage policies: 8 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56612Billing and Coding: CT of the Head
- A56773Billing and Coding: Neurophysiology Evoked Potentials (NEPs)
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
- A57206Billing and Coding: Lumbar MRI
Alphabetic index entries that lead here
- Disease, diseased›simian B
- Encephalitis›herpesviral
- Herpes, herpesvirus, herpetic›encephalitis
- Meningoencephalitis›herpesviral, herpetic
- Encephalitis›in›herpes virus(simplex)
- Meningoencephalitis›in›herpes
Code history
Unchanged in every release from FY2024 to FY2027.