2027 ICD-10-CM Diagnosis Code J11Influenza due to unidentified influenza virus

ICD-10-CM Codes›J00–J99›J09-J18›J11

ICD-10-CM J11
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

J11 is a non-billable ICD-10-CM category code for influenza due to unidentified influenza virus, so it cannot be submitted on claims. Use a more specific code from this category instead, such as J11.00, J11.08, J11.1, and J11.2.

Code Identity

ICD-10-CM Code
J11
Billable Status
No — Non-Billable Category
Code Describes
Influenza due to unidentified influenza virus
Short Description
Influenza due to unidentified influenza virus
Same as the full description in the CMS dataset.
Chapter
J09-J18
Influenza and pneumonia

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ09-J18Influenza and pneumonia
CategoryJ11Influenza due to unidentified influenza virus
This CodeJ11Influenza due to unidentified influenza virus

Specific Coding for Influenza due to unidentified influenza virusOverview

Non-specific codes like J11 require more characters. Use one of these billable codes instead:

  • J11.0 for Influenza due to unidentified influenza virus with pneumonia

  • Use J11.00 for Influenza due to unidentified influenza virus with unspecified type of pneumonia

  • Use J11.08 for Influenza due to unidentified influenza virus with specified pneumonia

  • Use J11.1 for Influenza due to unidentified influenza virus with other respiratory manifestations

  • Use J11.2 for Influenza due to unidentified influenza virus with gastrointestinal manifestations

  • J11.8 for Influenza due to unidentified influenza virus with other manifestations

  • Use J11.81 for Influenza due to unidentified influenza virus with encephalopathy

  • Use J11.82 for Influenza due to unidentified influenza virus with myocarditis

  • Use J11.83 for Influenza due to unidentified influenza virus with otitis media

  • Use J11.89 for Influenza due to unidentified influenza virus with other manifestations

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to J11: its own notes plus those printed at block J09-J18 and Chapter 10. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block J09-J18 Influenza and pneumonia applies to 53 codes
  • allergic or eosinophilic pneumonia (J82)
  • aspiration pneumonia NOS (J69.0)
  • meconium pneumonia (P24.01)
  • neonatal aspiration pneumonia (P24.-)
  • pneumonia due to solids and liquids (J69.-)
  • congenital pneumonia (P23.9)
  • lipid pneumonia (J69.1)
  • rheumatic pneumonia (I00)
  • ventilator associated pneumonia (J95.851)
From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • smoke inhalation (T59.81-)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Block J09-J18 Influenza and pneumonia applies to 53 codes
  • code, if applicable, to identify resistance to antimicrobial drugs (Z16.-)
From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • code, where applicable, to identify:
  • exposure to environmental tobacco smoke (Z77.22)
  • exposure to tobacco smoke in the perinatal period (P96.81)
  • history of tobacco dependence (Z87.891)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Notes

General instructions on how these codes are used.

From Chapter 10 (J00-J99) Diseases of the respiratory system applies to 366 codes
  • When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name J11, its category, or a range that includes it.

Excludes1 3

These codes carry an Excludes1 note naming J11: they are not reported together with it, unless the two conditions are unrelated.

  • J09 Influenza due to certain identified influenza viruses
    influenza due to unidentified influenza virus (J11.-)
  • J09 Influenza due to certain identified influenza viruses
    seasonal influenza due to unidentified influenza virus (J11.-)
  • J10 Influenza due to other identified influenza virus
    influenza due to unidentifed influenza virus (J11.-)

Patient EducationClinical

Flu

The flu, also called influenza, is a respiratory infection caused by viruses. Each year, millions of Americans get sick with the flu. Sometimes it causes mild illness. But it can also be serious or even deadly, especially for people over 65, newborn babies, and people with certain chronic illnesses.

The full article covers:

  • What is the flu?
  • What causes the flu?
  • What are the symptoms of the flu?
  • What other problems can the flu cause?
  • How is the flu diagnosed?
  • What are the treatments for the flu?
  • Can the flu be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About J11Overview

What is the ICD-10 code for influenza due to unidentified influenza virus?

J11 is the ICD-10-CM category for influenza due to unidentified influenza virus, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is J11 (Influenza due to unidentified influenza virus) a billable code?

No. This is a category header that groups the codes for influenza due to unidentified influenza virus, and headers cannot be submitted on claims. Claims for influenza due to unidentified influenza virus need a more specific code from this category, such as J11.00, J11.08, and J11.1.