ICD-10 codes for Influenza

Influenza is coded primarily under J11, J11.1, J10 in the ICD-10-CM (Clinical Modification) classification. Top-level categories include J09 (Influenza due to certain identified influenza viruses); J10 (Influenza due to other identified influenza virus); J11 (Influenza due to unidentified influenza virus). The 2025 ICD-10-CM code set includes 29 codes related to influenza, of which 21 are billable (specific enough to appear on a medical claim).

influenzafluseasonal fluH1N1influenza Ainfluenza B

Influenza is coded under J09, J10, and J11 in ICD-10-CM. J09 covers influenza due to certain identified influenza viruses (e.g., novel and avian strains). J10 covers influenza due to other identified influenza virus, and J11 covers influenza due to unidentified influenza virus, the most commonly used group when typing isn't documented.

Total Codes

29

Billable Codes

21

Categories

3

SNOMED CT Concepts

25+

Top 12 Relevant ICD-10 Codes

The codes most commonly assigned to influenza, ranked by primary-match status, billable status, and specificity. Tap a code to see its full ICD-10 detail page.

Primary Code Categories

These are the top-level ICD-10-CM categories for influenza. Click any code to see all specific subcodes within that group.

Billable / Specific Codes (21)

Specific ICD-10-CM codes that can be reported on medical claims for influenza.

J09.X1

Influenza due to ident novel influenza A virus w pneumonia

Billable
J09.X2

Flu due to ident novel influenza A virus w oth resp manifest

Billable
J09.X3

Influenza due to ident novel influenza A virus w GI manifest

Billable
J09.X9

Flu due to ident novel influenza A virus w oth manifest

Billable
J10.00

Flu due to oth ident flu virus w unsp type of pneumonia

Billable
J10.01

Flu due to oth ident flu virus w same oth ident flu virus pn

Billable
J10.08

Influenza due to oth ident influenza virus w oth pneumonia

Billable
J10.1

Flu due to oth ident influenza virus w oth resp manifest

Billable
J10.2

Influenza due to oth ident influenza virus w GI manifest

Billable
J10.81

Influenza due to oth ident influenza virus w encephalopathy

Billable
J10.82

Influenza due to oth ident influenza virus w myocarditis

Billable
J10.83

Influenza due to oth ident influenza virus w otitis media

Billable
J10.89

Influenza due to oth ident influenza virus w oth manifest

Billable
J11.00

Flu due to unidentified flu virus w unsp type of pneumonia

Billable
J11.08

Flu due to unidentified flu virus w specified pneumonia

Billable
J11.1

Flu due to unidentified influenza virus w oth resp manifest

Billable
J11.2

Influenza due to unidentified influenza virus w GI manifest

Billable
J11.81

Flu due to unidentified influenza virus w encephalopathy

Billable
J11.82

Influenza due to unidentified influenza virus w myocarditis

Billable
J11.83

Influenza due to unidentified influenza virus w otitis media

Billable
J11.89

Influenza due to unidentified influenza virus w oth manifest

Billable

Cross-Mappings to Other Standards

ICD-10-CM codes for influenza link to several adjacent terminologies. These mappings are precomputed from official sources (NLM RxNav, UMLS Metathesaurus, SNOMED CT International) and served via AutoICD's reference and translate APIs.

SNOMED CT

25+ concepts mapped from this code group. Concept IDs include 1011000124101, 181000124108, 231000124101, 441043003, ....

Browse SNOMED CT directory

UMLS Metathesaurus

25+ CUIs indexed. Sample: C2712970, C0016627, C2076596, C3264381, ....

Browse UMLS directory

ICD-11

ICD-11 (WHO 2022) classifies many of these conditions under different chapter and stem-code structures. Use the converter to see specific ICD-10 to ICD-11 mappings.

Open ICD-10 to ICD-11 converter

RxNorm and ICF

RxNorm covers medications used to treat influenza; ICF Core Sets describe how the condition affects functioning, activities, and participation.

Frequently Asked Questions

What is the ICD-10 code for influenza?

The primary ICD-10-CM codes for influenza are J11, J11.1, J10. Across all sub-categories, 29 codes are grouped under influenza, with 21 marked as billable (specific enough for a medical claim).

How many ICD-10 codes are there for influenza?

There are 29 ICD-10-CM codes related to influenza. Of these, 21 are billable specific codes and 8 are non-billable header categories that organize the specific codes underneath them. Header codes cannot be reported on a claim by themselves.

Is there a billable ICD-10 code for influenza?

Yes. 21 of the 29 ICD-10-CM codes for influenza are billable. Common examples include J09.X1 (Influenza due to ident novel influenza A virus w pneumonia); J09.X2 (Flu due to ident novel influenza A virus w oth resp manifest); J09.X3 (Influenza due to ident novel influenza A virus w GI manifest). Code to the highest level of specificity supported by the documentation.

Which influenza ICD-10 code should I use for billing?

The most commonly used billable codes for influenza include: J09.X1 (Influenza due to ident novel influenza A virus w pneumonia); J09.X2 (Flu due to ident novel influenza A virus w oth resp manifest); J09.X3 (Influenza due to ident novel influenza A virus w GI manifest). The correct code depends on the documented clinical presentation, including any complications, episode (acute / chronic), and laterality where applicable. Always code to the highest level of specificity supported by the clinical documentation.

Is J11 a billable ICD-10 code?

No, J11 (Influenza due to unidentified influenza virus) is a non-billable header code. You need to use a more specific child code for billing purposes.

What are the SNOMED CT concepts for influenza?

The ICD-10 codes for influenza map to at least 25 SNOMED CT concepts. Examples of SNOMED CT concept IDs in this group include 1011000124101, 181000124108, 231000124101, 441043003, 441343005. SNOMED CT is a clinical terminology used in electronic health records; AutoICD's coding API returns SNOMED CT IDs alongside each ICD-10 code via the include_snomed=true flag.

What UMLS Concept Unique Identifiers (CUIs) cover influenza?

The ICD-10 codes for influenza are linked to at least 25 UMLS CUIs in the National Library of Medicine's Metathesaurus. Sample CUIs include C2712970, C0016627, C2076596, C3264381, C3264382. UMLS CUIs unify the same concept across SNOMED CT, ICD-10, ICD-11, RxNorm, MeSH, and dozens of other source vocabularies.

What are other names for influenza in ICD-10?

Influenza may also be referred to as: influenza, flu, seasonal flu, H1N1, influenza A, influenza B. The same ICD-10-CM codes apply regardless of which term appears in the clinical documentation. Synonyms are surfaced by AutoICD's NER pass and mapped to the canonical ICD-10 family above.

Continue Browsing

Automate ICD-10 Coding With AI

Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.