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  2. ICD-10-CM Codes List
  3. J00–J99
  4. Influenza and pneumonia (J09-J18)

Influenza and pneumonia (J09-J18)

ICD-10 codes J09 through J18 cover a range of diagnoses for influenza and pneumonia, detailing specific virus types, bacterial causes, and complications like pneumonia with or without additional signs. These codes enable precise documentation of respiratory infections caused by various influenza viruses and different kinds of pneumonia.

Within this range, codes beginning with J09 and J10 specify influenza caused by identified novel or other influenza viruses, including subtypes like Influenza A virus and its related respiratory, gastrointestinal, or neurological manifestations. For instance, terms like "pneumonia caused by Influenza A virus" or "Influenza A virus subtype H1N1" link directly to these codes. The J11 series applies when the influenza virus is unidentified but still linked to respiratory symptoms or complications such as pneumonia or encephalopathy. Codes from J12 detail viral pneumonia due to specific viruses such as adenovirus, respiratory syncytial virus, or SARS-associated coronavirus, including COVID-19 pneumonia. The subsequent J13 to J16 codes categorize bacterial pneumonias by causative organisms like Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus (methicillin-sensitive or resistant), and others. Finally, codes in the J17 and J18 range describe pneumonia associated with other conditions or unspecified organisms, covering bronchopneumonia, lobar pneumonia, and hypostatic pneumonia without a clearly identified cause. This comprehensive classification facilitates accurate coding for diverse influenza and pneumonia diagnoses in medical records.

Instructional Notations

Use Additional Code

The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

  • code, if applicable, to identify resistance to antimicrobial drugs Z16

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

  • 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