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ICD-10-CM 2027 diagnosis code

A08Viral and other specified intestinal infections

Not billable — use a more specific code

A08 is a header code, so it can't be reported by itself. Choose one of the 6 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 A08

A08 is the ICD-10-CM diagnosis code for viral and other specified intestinal infections. It belongs to block A00-A09 (intestinal infectious diseases) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: A08.0 (enteritis), A08.1 (viruses), A08.2 (enteritis), A08.3 (enteritis), A08.4 (unspecified) and A08.8 (infections).

Don't report A08 together with the conditions in its Excludes1 note: influenza with involvement of gastrointestinal tract (J09.X3, J10.2, J11.2).

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 A08

Coding notes

Excludes1Not coded here — never report together with this code

Notes that apply from higher levels

Instructions written at a parent level also apply to A08.

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

Codes whose notes reference A08

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 A08

Is A08 billable?

No. A08 is a header code. Report one of its more specific subcodes instead.