J11

⚠ Non-billable (Header)

Influenza due to unidentified influenza virus

Diseases of the respiratory system (J00-J99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

✓ No additional coding notes for J11

Child Codes (4)

J11.0Influenza due to unidentified influenza virus with pneumoniaHeader J11.1Influenza due to unidentified influenza virus with other respiratory manifestations✓ Billable J11.2Influenza due to unidentified influenza virus with gastrointestinal manifestations✓ Billable J11.8Influenza due to unidentified influenza virus with other manifestationsHeader

Clinical Description

ICD-10-CM code J11 represents influenza due to unidentified influenza virus. This code falls under the Diseases of the respiratory system (J00-J99) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

Frequently Asked Questions

What is ICD-10 code J11?

ICD-10-CM code J11 is "Influenza due to unidentified influenza virus". It belongs to the category: Diseases of the respiratory system (J00-J99).

Is J11 a billable ICD-10 code?

No, J11 is a non-billable header code. A more specific child code must be used for billing.

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Code Information

CodeJ11

BillableNo — Header code

CategoryDiseases of the respiratory system (J00-J99)

Excludes10 rule(s)

Excludes20 note(s)

Child codes4

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)