ICD-10-CM 2027 diagnosis code

B19.1Unspecified viral hepatitis B

Not billable — use a more specific code

B19.1 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 B19.1

B19.1 is the ICD-10-CM diagnosis code for unspecified viral hepatitis B. It belongs to category B19 (unspecified viral hepatitis), block B15-B19 (viral hepatitis) 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.

Within B19 (unspecified viral hepatitis), B19.1 is specifically for unspecified viral hepatitis B. Related codes cover with hepatic coma (B19.0), C (B19.2) and without hepatic coma (B19.9).

To report this condition, pick the subcode that matches the documentation: B19.10 (without hepatic coma) and B19.11 (with hepatic coma).

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 B19.1

Notes that apply from higher levels

Instructions written at a parent level also apply to B19.1.

Broader instructions also apply from B15-B19 Viral hepatitis and 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 B19.1

Is B19.1 billable?: No. B19.1 is a header code. Report one of its more specific subcodes instead.