DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

J11 Influenza due to unidentified influenza virus

  • Header · not billable

J11 is not billable. The category heads 8 billable codes in FY2027, grouped under 4 subdivisions.

Index → code

  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus) → J11.1
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withenteritis → J11.2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withpneumonia → J11.00

Where it sits

  1. Chapter 10 Diseases of the respiratory system (J00-J99)
  2. J09-J18 Influenza and pneumonia (J09-J18)
  3. J11 Influenza due to unidentified influenza virus
Billable codes
8
Subdivisions
4
CC / MCC codes
0 / 2
HCC V28 codes
0
New FY2027
0
Index entries
14

Codes in J11

  1. J11.0
    Influenza due to unidentified influenza virus with pneumonia
    Header
    Code also 1

    Code also

    • associated lung abscess, if applicable (J85.1) J85.1
  2. J11.00
    Influenza due to unidentified influenza virus with unspecified type of pneumonia
    BillableMCC
    Inclusion terms 1

    Inclusion terms

    • Influenza with pneumonia NOS
  3. J11.08
    Influenza due to unidentified influenza virus with specified pneumonia
    BillableMCC
    Code also 1

    Code also

    • other specified type of pneumonia
  4. J11.1
    Influenza due to unidentified influenza virus with other respiratory manifestations
    Billable
    Inclusion terms 4, Use additional code 2

    Inclusion terms

    • Influenza NOS
    • Influenzal laryngitis NOS
    • Influenzal pharyngitis NOS
    • Influenza with upper respiratory symptoms NOS

    Use additional code

    • code for associated pleural effusion, if applicable (J91.8) J91.8
    • code for associated sinusitis, if applicable (J01.-) J01
  5. J11.2
    Influenza due to unidentified influenza virus with gastrointestinal manifestations
    Billable
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Influenza gastroenteritis NOS

    Excludes1

    • 'intestinal flu' [viral gastroenteritis] (A08.-) A08
  6. J11.8
    Influenza due to unidentified influenza virus with other manifestations
    Header
  7. J11.81
    Influenza due to unidentified influenza virus with encephalopathy
    Billable
    Inclusion terms 1

    Inclusion terms

    • Influenzal encephalopathy NOS
  8. J11.82
    Influenza due to unidentified influenza virus with myocarditis
    Billable
    Inclusion terms 1

    Inclusion terms

    • Influenzal myocarditis NOS
  9. J11.83
    Influenza due to unidentified influenza virus with otitis media
    Billable
    Inclusion terms 1, Use additional code 1

    Inclusion terms

    • Influenzal otitis media NOS

    Use additional code

    • code for any associated perforated tympanic membrane (H72.-) H72
  10. J11.89
    Influenza due to unidentified influenza virus with other manifestations
    Billable
    Use additional code 1

    Use additional code

    • codes to identify the manifestations

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

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

  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus) → J11.1
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withpneumonia → J11.00
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withlaryngitis → J11.1
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withpharyngitis → J11.1
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withrespiratory manifestations NEC → J11.1
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withdigestive manifestations → J11.2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withenteritis → J11.2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withgastroenteritis → J11.2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withgastrointestinal manifestations → J11.2
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withencephalopathy → J11.81
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withmyocarditis → J11.82
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withotitis media → J11.83
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withspecified manifestation NEC → J11.89
  • Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus)withpneumoniaspecified type → J11.08

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

Hierarchy