B10.09 — Other human herpesvirus encephalitis
B10.09 is a billable, specific ICD-10-CM code for other human herpesvirus encephalitis. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Human herpesvirus 7 encephalitis
Other codes that can never be billed with B10.09
These codes carry an Excludes1 note pointing at B10.09. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B10.09 alone.
- B00.4Herpesviral encephalitis
Risk adjustment
B10.09 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
B10.09 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56771Billing and Coding: Special Electroencephalography
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
How B10.09 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to B10.09.
- Encephalitis›herpesviral›due to herpesvirus 7
- Encephalitis›herpesviral›specified NEC
- Herpes, herpesvirus, herpetic›encephalitis›due to herpesvirus 7
- Herpes, herpesvirus, herpetic›encephalitis›specified NEC
- Meningoencephalitis›herpesviral, herpetic›due to herpesvirus 7
- Meningoencephalitis›herpesviral, herpetic›specified NEC
- Encephalitis›in›herpes virus›due to herpesvirus 7
- Encephalitis›in›herpes virus›specified NEC
- Herpes, herpesvirus, herpetic›human›7›encephalitis
- Meningoencephalitis›in›herpes›due to herpesvirus 7
- Meningoencephalitis›in›herpes›specified NEC
Related codes at this level
Codes that share B10.0. If B10.09 is not quite right, the correct code is usually one of these.
Questions about B10.09
- Is B10.09 a billable ICD-10-CM code?
- Yes. B10.09 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does B10.09 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Other human herpesviruses (B10).