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ICD-10-CM 2027 diagnosis code

B15Acute hepatitis A

Not billable — use a more specific code

B15 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 B15

B15 is the ICD-10-CM diagnosis code for acute hepatitis A. It belongs to 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.

To report this condition, pick the subcode that matches the documentation: B15.0 (coma) and B15.9 (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 B15

Notes that apply from higher levels

Instructions written at a parent level also apply to B15.

Broader instructions also apply from B15-B19 Viral hepatitis and Chapter 1: Certain infectious and parasitic diseases.

Codes whose notes reference B15

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about B15

Is B15 billable?

No. B15 is a header code. Report one of its more specific subcodes instead.