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J09

Non-billable

Influenza due to certain identified influenza viruses

J09 is the ICD-10-CM code for Influenza due to certain identified influenza viruses. It is a non-billable category code — use a more specific child code such as J09.X for billing.

Status
Header (non-billable)
Chapter
J00-J99
Subcodes
1
Edition
FY2026

J00-J99 Diseases of the respiratory system

What this means — in plain language

MedlinePlus · NIH

What is the flu? The flu, also called influenza, is a respiratory infection caused by viruses. Each year, millions of Americans get sick with the flu. Sometimes it causes mild illness. But it can also be serious or even deadly, especially for people over 65, newborn babies, and people with certain chronic illnesses. What causes the flu? The flu is caused by flu viruses that spread from person to person. When someone…

Read more about Flu at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • •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.-)

Conditions mapped to this code

MedlinePlus · NIH
Flu

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

Frequently asked questions

What is ICD-10 code J09?
J09 is the ICD-10-CM code for "Influenza due to certain identified influenza viruses". It falls under J00-J99 Diseases of the respiratory system.
Is J09 a billable code?
No — J09 is a non-billable header code. Use a more specific child code (such as J09.X) for billing.
What are the subcodes of J09?
J09 has 1 more specific child code, including J09.X.
What is excluded from J09?
Excludes1 (not coded here): 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.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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