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).
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.
J11.1Flu due to unidentified influenza virus w oth resp manifest
J09Influenza due to certain identified influenza viruses
J10Influenza due to other identified influenza virus
J11Influenza due to unidentified influenza virus
J10.1Flu due to oth ident influenza virus w oth resp manifest
J10.2Influenza due to oth ident influenza virus w GI manifest
J11.2Influenza due to unidentified influenza virus w GI manifest
J09.X1Influenza due to ident novel influenza A virus w pneumonia
J09.X2Flu due to ident novel influenza A virus w oth resp manifest
J09.X3Influenza due to ident novel influenza A virus w GI manifest
J09.X9Flu due to ident novel influenza A virus w oth manifest
J10.00Flu due to oth ident flu virus w unsp type of pneumonia
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.X1Influenza due to ident novel influenza A virus w pneumonia
J09.X2Flu due to ident novel influenza A virus w oth resp manifest
J09.X3Influenza due to ident novel influenza A virus w GI manifest
J09.X9Flu due to ident novel influenza A virus w oth manifest
J10.00Flu due to oth ident flu virus w unsp type of pneumonia
J10.01Flu due to oth ident flu virus w same oth ident flu virus pn
J10.08Influenza due to oth ident influenza virus w oth pneumonia
J10.1Flu due to oth ident influenza virus w oth resp manifest
J10.2Influenza due to oth ident influenza virus w GI manifest
J10.81Influenza due to oth ident influenza virus w encephalopathy
J10.82Influenza due to oth ident influenza virus w myocarditis
J10.83Influenza due to oth ident influenza virus w otitis media
J10.89Influenza due to oth ident influenza virus w oth manifest
J11.00Flu due to unidentified flu virus w unsp type of pneumonia
J11.08Flu due to unidentified flu virus w specified pneumonia
J11.1Flu due to unidentified influenza virus w oth resp manifest
J11.2Influenza due to unidentified influenza virus w GI manifest
J11.81Flu due to unidentified influenza virus w encephalopathy
J11.82Influenza due to unidentified influenza virus w myocarditis
J11.83Influenza due to unidentified influenza virus w otitis media
J11.89Influenza due to unidentified influenza virus w oth manifest
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 directoryUMLS Metathesaurus
25+ CUIs indexed. Sample: C2712970, C0016627, C2076596, C3264381, ....
Browse UMLS directoryICD-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 converterFrequently 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.
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