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Table 2 Additional influenza-related complication ICD9 codes in children

From: Pneumonia and influenza, and respiratory and circulatory hospital admissions in Belgium: a retrospective database study

Category

Type

ICD-9 code

1° Ear, nose and throat

Acute otitis media

381-381.03, 381.4, 382-382.02, 382.4, 382.9

 

Other upper acute respiratory infections

 
 

  - Nasopharyngitis

460

 

  - Pharyngitis

462

 

  - Tonsillitis

463

 

  - Laryngitis and tracheitis

464-464.4

 

Acute sinusitis

461-461.9

 

Upper respiratory infection

465-465.9

 

Influenza with other respiratory manifestations

487.1

2° Lung disease

Acute bronchitis and bronchiolitis

466-466.1, 466.19

 

480, 480.8, 480.9, 481, 482,

 

Acute pneumonia and influenza

483, 483.8, 485, 486, 487.0

 

Asthma

493-493.9

3°Cardiac disease

Pericarditis

420, 420.9-420.99

 

Myocarditis

422, 422.9-422.92, 422.99

 

Heart failure

428-428.9

4° Neurological Ailments

Reye’s syndrome

331.81

 

Encephalopathy

348.3, 487.8

 

Febrile convulsions

780.31

 

Ataxia

781.3

 

Guillain-Barre syndrome

357

5° Renal disease

Glomerulonephritis Nephrotic syndrome, renal failure, Pyelonephritis

580-580.9, 581-581.9, 583-583.7, 583.9, 584-584.9, 586, 590.1-590.9

6° Muscular disease

Myositis and Myoglobinuria

728.0, 729.1, 791.3

  1. Source: International Classification of Disease – 9th Edition; Codes were selected after a review of the literature [11].