Chapter X
Diseases of the respiratory system
(J00-J99)

Chronic lower respiratory diseases
(J40-J47)

Excludes: cystic fibrosis ( E84.- )

J40 Bronchitis, not specified as acute or chronic
Note: Bronchitis not specified as acute or chronic in those under 15 years of age can be assumed to be of acute nature and should be classified to J20.-.
Bronchitis:
· NOS
· catarrhal
· with tracheitis NOS
Tracheobronchitis NOS
Excludes: bronchitis:
· allergic NOS ( J45.0 )
· asthmatic NOS ( J45.9 )
· chemical (acute) ( J68.0 )

J41 Simple and mucopurulent chronic bronchitis
Excludes: chronic bronchitis:
· NOS ( J42 )
· obstructive ( J44.- )
J41.0 Simple chronic bronchitis
J41.1 Mucopurulent chronic bronchitis
J41.8 Mixed simple and mucopurulent chronic bronchitis

J42 Unspecified chronic bronchitis
Chronic:
· bronchitis NOS
· tracheitis
· tracheobronchitis
Excludes: chronic:
· asthmatic bronchitis ( J44.- )
· bronchitis:
  · simple and mucopurulent ( J41.- )
  · with airways obstruction ( J44.- )
· emphysematous bronchitis ( J44.- )
· obstructive pulmonary disease NOS ( J44.9 )

J43 Emphysema
Excludes: emphysema:
· compensatory ( J98.3 )
· due to inhalation of chemicals, gases, fumes or vapours ( J68.4 )
· interstitial ( J98.2 )
  · neonatal ( P25.0 )
· mediastinal ( J98.2 )
· surgical (subcutaneous) ( T81.8 )
· traumatic subcutaneous ( T79.7 )
· with chronic (obstructive) bronchitis ( J44.- )
emphysematous (obstructive) bronchitis ( J44.- )
J43.0 MacLeod's syndrome
Unilateral:
· emphysema
· transparency of lung
J43.1 Panlobular emphysema
Panacinar emphysema
J43.2 Centrilobular emphysema
J43.8 Other emphysema
J43.9 Emphysema, unspecified
Emphysema (lung)(pulmonary):
· NOS
· bullous
· vesicular
Emphysematous bleb

J44 Other chronic obstructive pulmonary disease
Includes: chronic:
· bronchitis:
  · asthmatic (obstructive)
  · emphysematous
  · with:
    · airways obstruction
    · emphysema
· obstructive:
  · asthma
  · bronchitis
  · tracheobronchitis
Excludes: asthma ( J45.- )
asthmatic bronchitis NOS ( J45.9 )
bronchiectasis ( J47 )
chronic:
· bronchitis:
  · NOS ( J42 )
  · simple and mucopurulent ( J41.- )
· tracheitis ( J42 )
· tracheobronchitis ( J42 )
emphysema ( J43.- )
lung diseases due to external agents ( J60-J70 )
J44.0 Chronic obstructive pulmonary disease with acute lower respiratory infection
Excludes: with influenza ( J98-J11 )
J44.1 Chronic obstructive pulmonary disease with acute exacerbation, unspecified
J44.8 Other specified chronic obstructive pulmonary disease
Chronic bronchitis:
· asthmatic (obstructive) NOS
· emphysematous NOS
· obstructive NOS
Excludes: with acute exacerbation ( J44.1 )
with acute lower respiratory infection ( J44.0 )
J44.9 Chronic obstructive pulmonary disease, unspecified
Chronic obstructive:
· airway disease NOS
· lung disease NOS

J45 Asthma
Excludes: acute severe asthma ( J46 )
chronic asthmatic (obstructive) bronchitis ( J44.- )
chronic obstructive asthma ( J44.- )
eosinophilic asthma ( J82 )
lung diseases due to external agents ( J60-J70 )
status asthmaticus ( J46 )
J45.0 Predominantly allergic asthma
Allergic:
· bronchitis NOS
· rhinitis with asthma
Atopic asthma
Extrinsic allergic asthma
Hay fever with asthma
J45.1 Nonallergic asthma
Idiosyncratic asthma
Intrinsic nonallergic asthma
J45.8 Mixed asthma
Combination of conditions listed in J45.0 and J45.1
J45.9 Asthma, unspecified
Asthmatic bronchitis NOS
Late-onset asthma

J46 Status asthmaticus
Acute severe asthma

J47 Bronchiectasis
Bronchiolectasis
Excludes: congenital bronchiectasis ( Q33.4 )
tuberculous bronchiectasis (current disease) ( A15-A16 )