ICD-10-CM 2027 diagnosis code

B05Measles

Not billable — use a more specific code

B05 is a header code, so it can't be reported by itself. Choose one of the 7 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 B05

B05 is the ICD-10-CM diagnosis code for measles. It belongs to block B00-B09 (viral infections characterized by skin and mucous membrane lesions) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: B05.0 (complicated by encephalitis), B05.1 (complicated by meningitis), B05.2 (complicated by pneumonia), B05.3 (complicated by otitis media), B05.4 (with intestinal complications), B05.8 (with other complications) and B05.9 (without complication).

Don't report B05 together with the conditions in its Excludes1 note: subacute sclerosing panencephalitis (A81.1).

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 B05

Coding notes

IncludesFurther defines the content of the category

morbilli

Excludes1Not coded here — never report together with this code

subacute sclerosing panencephalitis (A81.1)

Notes that apply from higher levels

Instructions written at a parent level also apply to B05.

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 B05

Is B05 billable?: No. B05 is a header code. Report one of its more specific subcodes instead.