ICD-10-CM 2027 diagnosis code

B10Other human herpesviruses

Not billable — use a more specific code

B10 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About B10

B10 is the ICD-10-CM diagnosis code for other human herpesviruses. It belongs to block B10 (other human herpesviruses) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: B10.0 (encephalitis) and B10.8 (infection).

The conditions in its Excludes2 note aren't part of B10, but may be coded alongside it if the patient has both: cytomegalovirus (B25.9), Epstein-Barr virus (B27.0-), herpes NOS (B00.9), herpes simplex (B00.-) and 8 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under B10

Coding notes

Excludes2Not included here — may be reported together if both conditions exist

cytomegalovirus (B25.9)
Epstein-Barr virus (B27.0-)
herpes NOS (B00.9)
herpes simplex (B00.-)
herpes zoster (B02.-)
human herpesvirus NOS (B00.-)
human herpesvirus 1 and 2 (B00.-)
human herpesvirus 3 (B01.-, B02.-)
human herpesvirus 4 (B27.0-)
human herpesvirus 5 (B25.-)
varicella (B01.-)
zoster (B02.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to B10.

Broader instructions also apply from Chapter 1: Certain infectious and parasitic diseases.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about B10

Is B10 billable?: No. B10 is a header code. Report one of its more specific subcodes instead.