Influenza and pneumonia
69 codes in this section
About Section J09-J18
Section J09-J18 (J09-J18) covers influenza and pneumonia. It sits within the Diseases of the respiratory system chapter (J00-J99). This section contains 69 ICD-10-CM codes, 53 billable diagnoses you can submit on a claim, and 16 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in J09-J18
Grouped by 3-character root code. Click any code for full detail.
| J09.X | Influenza due to identified novel influenza A virus | Header |
| J09.X1 | Influenza due to identified novel influenza A virus with pneumonia | Billable |
| J09.X2 | Influenza due to identified novel influenza A virus with other respiratory manifestations | Billable |
| J09.X3 | Influenza due to identified novel influenza A virus with gastrointestinal manifestations | Billable |
| J09.X9 | Influenza due to identified novel influenza A virus with other manifestations | Billable |
| J10.0 | Influenza due to other identified influenza virus with pneumonia | Header |
| J10.00 | Influenza due to other identified influenza virus with unspecified type of pneumonia | Billable |
| J10.01 | Influenza due to other identified influenza virus with the same other identified influenza virus pneumonia | Billable |
| J10.08 | Influenza due to other identified influenza virus with other specified pneumonia | Billable |
| J10.1 | Influenza due to other identified influenza virus with other respiratory manifestations | Billable |
| J10.2 | Influenza due to other identified influenza virus with gastrointestinal manifestations | Billable |
| J10.8 | Influenza due to other identified influenza virus with other manifestations | Header |
| J10.81 | Influenza due to other identified influenza virus with encephalopathy | Billable |
| J10.82 | Influenza due to other identified influenza virus with myocarditis | Billable |
| J10.83 | Influenza due to other identified influenza virus with otitis media | Billable |
| J10.89 | Influenza due to other identified influenza virus with other manifestations | Billable |
| J11.0 | Influenza due to unidentified influenza virus with pneumonia | Header |
| J11.00 | Influenza due to unidentified influenza virus with unspecified type of pneumonia | Billable |
| J11.08 | Influenza due to unidentified influenza virus with specified pneumonia | Billable |
| J11.1 | Influenza due to unidentified influenza virus with other respiratory manifestations | Billable |
| J11.2 | Influenza due to unidentified influenza virus with gastrointestinal manifestations | Billable |
| J11.8 | Influenza due to unidentified influenza virus with other manifestations | Header |
| J11.81 | Influenza due to unidentified influenza virus with encephalopathy | Billable |
| J11.82 | Influenza due to unidentified influenza virus with myocarditis | Billable |
| J11.83 | Influenza due to unidentified influenza virus with otitis media | Billable |
| J11.89 | Influenza due to unidentified influenza virus with other manifestations | Billable |
| J12.0 | Adenoviral pneumonia | Billable |
| J12.1 | Respiratory syncytial virus pneumonia | Billable |
| J12.2 | Parainfluenza virus pneumonia | Billable |
| J12.3 | Human metapneumovirus pneumonia | Billable |
| J12.8 | Other viral pneumonia | Header |
| J12.81 | Pneumonia due to SARS-associated coronavirus | Billable |
| J12.82 | Pneumonia due to coronavirus disease 2019 | Billable |
| J12.89 | Other viral pneumonia | Billable |
| J12.9 | Viral pneumonia, unspecified | Billable |
| J15.0 | Pneumonia due to Klebsiella pneumoniae | Billable |
| J15.1 | Pneumonia due to Pseudomonas | Billable |
| J15.2 | Pneumonia due to staphylococcus | Header |
| J15.20 | Pneumonia due to staphylococcus, unspecified | Billable |
| J15.21 | Pneumonia due to staphylococcus aureus | Header |
| J15.211 | Pneumonia due to Methicillin susceptible Staphylococcus aureus | Billable |
| J15.212 | Pneumonia due to Methicillin resistant Staphylococcus aureus | Billable |
| J15.29 | Pneumonia due to other staphylococcus | Billable |
| J15.3 | Pneumonia due to streptococcus, group B | Billable |
| J15.4 | Pneumonia due to other streptococci | Billable |
| J15.5 | Pneumonia due to Escherichia coli | Billable |
| J15.6 | Pneumonia due to other Gram-negative bacteria | Header |
| J15.61 | Pneumonia due to Acinetobacter baumannii | Billable |
| J15.69 | Pneumonia due to other Gram-negative bacteria | Billable |
| J15.7 | Pneumonia due to Mycoplasma pneumoniae | Billable |
| J15.8 | Pneumonia due to other specified bacteria | Billable |
| J15.9 | Unspecified bacterial pneumonia | Billable |
| J16.0 | Chlamydial pneumonia | Billable |
| J16.8 | Pneumonia due to other specified infectious organisms | Billable |
| J18.0 | Bronchopneumonia, unspecified organism | Billable |
| J18.1 | Lobar pneumonia, unspecified organism | Billable |
| J18.2 | Hypostatic pneumonia, unspecified organism | Billable |
| J18.8 | Other pneumonia, unspecified organism | Billable |
| J18.9 | Pneumonia, unspecified organism | Billable |
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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