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

Billable ICD-10-CM code, FY2026. Acts as a Major Complication or Comorbidity (MCC) as a secondary diagnosis.

Applicable to

• Influenza with pneumonia NOS

Applies from J11.0 Influenza due to unidentified influenza virus with pneumonia

Code also

• associated lung abscess, if applicable (J85.1)

MS-DRG index

Defines the logic of DRG(s) 177-179 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 487.0 Influenza with pneumonia (approximate)

Code annotations containing back-references to J11.00

Back-references to J11.0

• Code First: J12 Viral pneumonia, not elsewhere classified ("associated influenza, if applicable (J09.X1, J10.0-, J11.0-)")
• Code First: J13 Pneumonia due to Streptococcus pneumoniae (", if applicable, associated influenza (J09.X1, J10.0-, J11.0-)")
• Code First: J14 Pneumonia due to Hemophilus influenzae (", if applicable, associated influenza (J09.X1, J10.0-, J11.0-)")
• Code First: J15 Bacterial pneumonia, not elsewhere classified (", if applicable, associated influenza (J09.X1, J10.0-, J11.0-)")
• Code First: J16 Pneumonia due to other infectious organisms, not elsewhere classified (", if applicable, associated influenza (J09.X1, J10.0-, J11.0-)")
• Code First: J18 Pneumonia, unspecified organism (", if applicable, associated influenza (J09.X1, J10.0-, J11.0-)")

Back-references to J11

• Type 1 Excludes: J09 Influenza due to certain identified influenza viruses ("influenza due to unidentified influenza virus (J11.-)")
• Type 1 Excludes: J09 Influenza due to certain identified influenza viruses ("seasonal influenza due to unidentified influenza virus (J11.-)")
• Type 1 Excludes: J10 Influenza due to other identified influenza virus ("influenza due to unidentifed influenza virus (J11.-)")

Diagnosis Index entries for J11.00

• Influenza (bronchial) (epidemic) (respiratory (upper)) (unidentified influenza virus) › with › pneumonia

Nearby codes

• J11 Influenza due to unidentified influenza virus
• J11.0 Influenza due to unidentified influenza virus with pneumonia
• J11.00 Influenza due to unidentified influenza virus with unspecified type of pneumonia (this code)
• J11.08 Influenza due to unidentified influenza virus with specified pneumonia
• J11.1 Influenza due to unidentified influenza virus with other respiratory manifestations
• J11.2 Influenza due to unidentified influenza virus with gastrointestinal manifestations
• J11.8 Influenza due to unidentified influenza virus with other manifestations
• J11.81 Influenza due to unidentified influenza virus with encephalopathy