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Table 1 Acute lower respiratory infection ICD codes

From: Hospital utilization rates for influenza and RSV: a novel approach and critical assessment

ICD Version Code Description
ICD-10 J10 Influenza due to identified seasonal influenza virus
ICD-10 J11 Influenza, virus not identified
ICD-10 J12 Viral pneumonia, not elsewhere classified
ICD-10 J13 Pneumonia due to Streptococcus pneumoniae
ICD-10 J14 Pneumonia due to Haemophilus influenzae
ICD-10 J15 Bacterial pneumonia, not elsewhere classified
ICD-10 J16 Pneumonia due to other infectious organisms, not elsewhere classified
ICD-10 J18 Pneumonia, organism unspecified
ICD-10 J20 Acute bronchitis
ICD-10 J21 Acute bronchiolitis
ICD-10 J22 Unspecified acute lower respiratory infection
ICD-9 466 Acute bronchitis and bronchiolitis
ICD-9 480 Viral pneumonia
ICD-9 481 Pneumococcal pneumonia
ICD-9 482 Other bacterial pneumonia
ICD-9 483 Pneumonia due to other specified organism
ICD-9 484 Pneumonia in infectious diseases classified elsewhere
ICD-9 485 Bronchopneumonia, organism unspecified
ICD-9 486 Pneumonia, organism unspecified
ICD-9 487 Influenza
ICD-9 488 Influenza due to identified avian influenza virus
  1. ICD codes used to identify ALRI primary admissions. Note that all more detailed codes below those listed were also included