TableĀ 1

Grouping of respiratory admissions into acute asthma, acute bronchitis/acute bronchiolitis and acute exacerbation of COPD categories according to ICD codes

ICD9: Asthma493.0Extrinsic asthma
493.1Intrinsic asthma
493.2Chronic obstructive asthma
493.8Other forms of asthma
493.9Asthma, unspecified
ICD10: AsthmaJ45.0Predominantly allergic asthma
J45.1Nonallergic asthma
J45.8Mixed asthma
J45.9Asthma, unspecified
J46Status asthmaticus
ICD9: Bronchitis & bronchiolitis466.0Acute bronchitis
466.1Acute bronchiolitis
ICD10: Bronchitis & bronchiolitisJ20.0Acute bronchitis due to Mycoplasma pneumoniae
J20.1Acute bronchitis due to Haemophilus influenzae
J20.2Acute bronchitis due to streptococcus
J20.3Acute bronchitis due to coxsackievirus
J20.4Acute bronchitis due to parainfluenza virus
J20.5Acute bronchitis due to respiratory syncytial virus
J20.6Acute bronchitis due to rhinovirus
J20.7Acute bronchitis due to echovirus
J20.8Acute bronchitis due to other specified organisms
J20.9Acute bronchitis, unspecified
J21.0Acute bronchiolitis due to respiratory syncytial virus
J21.1Acute bronchiolitis due to human metapneumovirus
J21.8Acute bronchiolitis due to other specified organisms
J21.9Acute bronchiolitis, unspecified
J22Unspecified acute lower respiratory infection
ICD9: Chronic obstructive pulmonary disease491.0Simple chronic bronchitis
491.1Mucopurulent chronic bronchitis
491.2Obstructive chronic bronchitis
491.8Other chronic bronchitis
491.9Unspecified chronic bronchitis
492.8Other emphysema
ICD10: Chronic obstructive pulmonary diseaseJ41.0Simple chronic bronchitis
J41.1Mucopurulent chronic bronchitis
J41.8Mixed simple and mucopurulent chronic bronchitis
J42Unspecified chronic bronchitis
J44.0Chronic obstructive pulmonary disease with acute lower respiratory infection
J44.1Chronic obstructive pulmonary disease with acute exacerbation, unspecified
J44.8Other specified chronic obstructive pulmonary disease
J44.9Chronic obstructive pulmonary disease, unspecified
  • COPD, chronic obstructive pulmonary disease; ICD9, International Classification of Diseases, Ninth Revision; ICD10, ICD Tenth Revision.