J11 – Influenza due to unidentified influenza virus

ICD-10-CM 2027 diagnosis code · Influenza and pneumonia

Non-billable header

ICD-10-CM code J11

Code: J11 (claims format: J11)
Description: Influenza due to unidentified influenza virus
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 10. Diseases of the respiratory system (J00-J99)
Block: J09-J18 Influenza and pneumonia

Billable codes under J11

J11 is a header code and cannot be used on claims. Choose the most specific code:

J11.0 – Influenza due to unidentified influenza virus with pneumoniaHeader (more codes below)
J11.1 – Influenza due to unidentified influenza virus with other respiratory manifestationsBillable
J11.2 – Influenza due to unidentified influenza virus with gastrointestinal manifestationsBillable
J11.8 – Influenza due to unidentified influenza virus with other manifestationsHeader (more codes below)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block J09-J18

Excludes2 (not included here):

allergic or eosinophilic pneumonia (J82)
aspiration pneumonia NOS (J69.0)
meconium pneumonia (P24.01)
neonatal aspiration pneumonia (P24.-)
pneumonia due to solids and liquids (J69.-)
congenital pneumonia (P23.9)
lipid pneumonia (J69.1)
rheumatic pneumonia (I00)
ventilator associated pneumonia (J95.851)

Use additional code:

code, if applicable, to identify resistance to antimicrobial drugs (Z16.-)

Frequently asked questions

What is ICD-10 code J11?

J11 is the ICD-10-CM code for influenza due to unidentified influenza virus, in the block J09-J18 (Influenza and pneumonia).

Is J11 a billable code?

No. J11 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.