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ICD-10-CM 2027 diagnosis code

J09Influenza due to certain identified influenza viruses

Not billable — use a more specific code

J09 is a header code, so it can't be reported by itself. Choose one of the 1 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 J09

J09 is the ICD-10-CM diagnosis code for influenza due to certain identified influenza viruses. It belongs to block J09-J18 (influenza and pneumonia) and chapter 10 (diseases of the respiratory system). It is a header code, so it can't be reported by itself; one of its 1 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: J09.X (virus).

Don't report J09 together with the conditions in its Excludes1 note: influenza A/H1N1 (J10.-), influenza due to other identified influenza virus (J10.-), influenza due to unidentified influenza virus (J11.-), seasonal influenza due to other identified influenza virus (J10.-) and 1 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 J09

Coding notes

Excludes1Not coded here — never report together with this code
  • influenza A/H1N1 (J10.-)
  • influenza due to other identified influenza virus (J10.-)
  • influenza due to unidentified influenza virus (J11.-)
  • seasonal influenza due to other identified influenza virus (J10.-)
  • seasonal influenza due to unidentified influenza virus (J11.-)

Notes that apply from higher levels

Instructions written at a parent level also apply to J09.

Broader instructions also apply from J09-J18 Influenza and pneumonia and Chapter 10: Diseases of the respiratory system.

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 J09

Is J09 billable?

No. J09 is a header code. Report one of its more specific subcodes instead.