ICD-10-CM 2027 · J40-J4B

Chronic lower respiratory diseases

Part of chapter 10, diseases of the respiratory system.

About J40-J4B

Block J40-J4B contains 9 categories and 40 billable codes for FY2027. This year's update added 1 and deleted 0 codes here. 1 codes are MCCs and 14 are CCs when reported as secondary diagnoses.

J40Bronchitis, not specified as acute or chronic

J41Simple and mucopurulent chronic bronchitis

J41.0Simple chronic bronchitis
J41.1Mucopurulent chronic bronchitis
J41.8Mixed simple and mucopurulent chronic bronchitis

J42Unspecified chronic bronchitis

J43Emphysema

J43.0Unilateral pulmonary emphysema [MacLeod's syndrome]
J43.1Panlobular emphysema
J43.2Centrilobular emphysema
J43.8Other emphysema
J43.9Emphysema, unspecified

J44Other chronic obstructive pulmonary disease

J44.0Chronic obstructive pulmonary disease with (acute) lower respiratory infection
J44.1Chronic obstructive pulmonary disease with (acute) exacerbation
J44.8Other specified chronic obstructive pulmonary disease
J44.9Chronic obstructive pulmonary disease, unspecified

J4AChronic lung allograft dysfunction

J4A.0Restrictive allograft syndrome
J4A.8Other chronic lung allograft dysfunction
J4A.9Chronic lung allograft dysfunction, unspecified

J4BPulmonary mycetoma

J45Asthma

J45.2Mild intermittent asthma
J45.3Mild persistent asthma
J45.4Moderate persistent asthma
J45.5Severe persistent asthma
J45.9Other and unspecified asthma

J47Bronchiectasis

J47.0Bronchiectasis with acute lower respiratory infection
J47.1Bronchiectasis with (acute) exacerbation
J47.9Bronchiectasis, uncomplicated

Block notes

Excludes1

bronchitis due to chemicals, gases, fumes and vapors (J68.0)

Excludes2

cystic fibrosis (E84.-)