ICD10
ICD-10 Code J09: Influenza due to certain identified influenza viruses
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the respiratory system (J00-J99).
When is it used?
- May be used when a clinician documents influenza due to certain identified influenza viruses in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
10Diseases of the respiratory system (J00-J99)
block
J09-J18Influenza and pneumonia
currentJ09-J18
Official coding notes
Excludes1 (do not code together)
- 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.-)
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
PulmonologistGeneral Physician
Related codes
J10Influenza due to other identified influenza viruscategoryJ11Influenza due to unidentified influenza viruscategoryJ12Viral pneumonia, not elsewhere classifiedcategoryJ13Pneumonia due to Streptococcus pneumoniaecodeJ14Pneumonia due to Hemophilus influenzaecodeJ15Bacterial pneumonia, not elsewhere classifiedcategoryJ16Pneumonia due to other infectious organisms, not elsewhere classifiedcategoryJ17Pneumonia in diseases classified elsewherecodeJ18Pneumonia, unspecified organismcategory
Sibling codes
J10Influenza due to other identified influenza virusJ11Influenza due to unidentified influenza virusJ12Viral pneumonia, not elsewhere classifiedJ13Pneumonia due to Streptococcus pneumoniaebillableJ14Pneumonia due to Hemophilus influenzaebillableJ15Bacterial pneumonia, not elsewhere classifiedJ16Pneumonia due to other infectious organisms, not elsewhere classifiedJ17Pneumonia in diseases classified elsewherebillableJ18Pneumonia, unspecified organism
Mapped diagnoses and classifications
SNOMED_CT 772828001high
Influenza caused by Influenza A virus subtype H5N1
Source: SNOMED International ICD-10 map
SNOMED_CT 1395928000high
Influenza caused by Influenza A virus subtype H5N8
Source: SNOMED International ICD-10 map
SNOMED_CT 707448003high
Influenza caused by Influenza A virus subtype H7N9
Source: SNOMED International ICD-10 map
SNOMED_CT 719865001high
Influenza caused by pandemic influenza virus
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
J09
Common synonyms
Influenza due to certain identified influenza viruses
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.