DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

J09 Influenza due to certain identified influenza viruses

  • Header · not billable

J09 is not billable. The category heads 4 billable codes in FY2027, grouped under 1 subdivision.

Index → code

  • Flubird → J09.X2
  • Fluavian → J09.X2
  • Fluswine (viruses that normally cause infections in pigs) → J09.X2

Where it sits

  1. Chapter 10 Diseases of the respiratory system (J00-J99)
  2. J09-J18 Influenza and pneumonia (J09-J18)
  3. J09 Influenza due to certain identified influenza viruses
Billable codes
4
Subdivisions
1
CC / MCC codes
0 / 1
HCC V28 codes
0
New FY2027
0
Index entries
24

Codes in J09

  1. J09.X
    Influenza due to identified novel influenza A virus
    Header
    Inclusion terms 5

    Inclusion terms

    • Avian influenza
    • Bird influenza
    • Influenza A/H5N1
    • Influenza of other animal origin, not bird or swine
    • Swine influenza virus (viruses that normally cause infections in pigs)
  2. J09.X1
    Influenza due to identified novel influenza A virus with pneumonia
    BillableMCC
    Code also 3

    Code also

    • , if applicable, associated:
    • lung abscess (J85.1) J85.1
    • other specified type of pneumonia
  3. J09.X2
    Influenza due to identified novel influenza A virus with other respiratory manifestations
    Billable
    Inclusion terms 4, Use additional code 3

    Inclusion terms

    • Influenza due to identified novel influenza A virus NOS
    • Influenza due to identified novel influenza A virus with laryngitis
    • Influenza due to identified novel influenza A virus with pharyngitis
    • Influenza due to identified novel influenza A virus with upper respiratory symptoms

    Use additional code

    • code, if applicable, for associated:
    • pleural effusion (J91.8) J91.8
    • sinusitis (J01.-) J01
  4. J09.X3
    Influenza due to identified novel influenza A virus with gastrointestinal manifestations
    Billable
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Influenza due to identified novel influenza A virus gastroenteritis

    Excludes1

    • 'intestinal flu' [viral gastroenteritis] (A08.-) A08
  5. J09.X9
    Influenza due to identified novel influenza A virus with other manifestations
    Billable
    Inclusion terms 3, Use additional code 1

    Inclusion terms

    • Influenza due to identified novel influenza A virus with encephalopathy
    • Influenza due to identified novel influenza A virus with myocarditis
    • Influenza due to identified novel influenza A virus with otitis media

    Use additional code

    • code to identify manifestation

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At J09

Excludes1

  • influenza A/H1N1 (J10.-) J10
  • influenza due to other identified influenza virus (J10.-) J10
  • influenza due to unidentified influenza virus (J11.-) J11
  • seasonal influenza due to other identified influenza virus (J10.-) J10
  • seasonal influenza due to unidentified influenza virus (J11.-) J11

Notes that also apply

Block J09-J18 instructions (Excludes2 9, Use additional code 1): printed on the block page.

Chapter 10 instructions (Notes 1, Excludes2 9, Use additional code 7): printed on the chapter 10 page.

Index entries

  • Fluavian → J09.X2
  • Flubird → J09.X2
  • Fluswine (viruses that normally cause infections in pigs) → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)A/H5N1 → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)avian → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)bird → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)of other animal origin, not bird or swine → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)swine (viruses that normally cause infections in pigs) → J09.X2
  • Virus, viralswine influenza (viruses that normally cause infections in pigs) → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toavian → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A virus → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithpneumonia → J09.X1
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithlaryngitis → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithpharyngitis → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithrespiratory manifestations NEC → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithupper respiratory symptoms → J09.X2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithdigestive manifestations → J09.X3
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithenteritis → J09.X3
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithgastroenteritis → J09.X3
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithgastrointestinal manifestations → J09.X3
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithencephalopathy → J09.X9
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithmyocarditis → J09.X9
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithotitis media → J09.X9
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)due toidentified novel influenza A viruswithspecified manifestation NEC → J09.X9

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy