CHRONIC OBSTRUCTIVE PULMONARY DISEASE AND ALLIED CONDITIONS (490-496)

• 490 Bronchitis, not specified as acute or chronic
  • Bronchitis NOS:
    • catarrhal
    • with tracheitis NOS
  • Tracheobronchitis NOS
  • Excludes: bronchitis:
    • allergic NOS (493.9)
    • asthmatic NOS (493.9)
    • due to fumes and vapors (506.0)
• 491 Chronic bronchitis
  • Excludes: chronic obstructive asthma (493.2)
  • 491.0 Simple chronic bronchitis
    • Catarrhal bronchitis, chronic
    • Smokers' cough
  • 491.1 Mucopurulent chronic bronchitis
    • Bronchitis (chronic) (recurrent):
      • fetid
      • mucopurulent
      • purulent
  • 491.2 Obstructive chronic bronchitis
    • Bronchitis:
      • asthmatic, chronic
      • emphysematous
      • obstructive (chronic) (diffuse)
    • Bronchitis with:
      • chronic airway obstruction
      • emphysema
    • Excludes: asthmatic bronchitis (acute) (NOS) 493.9
      • chronic obstructive asthma 493.2
    • 491.20 Without mention of acute exacerbation
      • Chronic asthmatic bronchitis
      • Emphysema with chronic bronchitis
    • 491.21 With acute exacerbation
      • Acute bronchitis with chronic obstructive pulmonary disease [COPD]
      • Acute and chronic obstructive bronchitis
      • Chronic asthmatic bronchitis with acute exacerbation
      • Emphysema with acute and chronic bronchitis
  • 491.8 Other chronic bronchitis
    • Chronic:
      • tracheitis
      • tracheobronchitis
  • 491.9 Unspecified chronic bronchitis
• 492 Emphysema
  • 492.0 Emphysematous bleb
    • Giant bullous emphysema
    • Ruptured emphysematous bleb
    • Tension pneumatocele
    • Vanishing lung
  • 492.8 Other emphysema
    • Emphysema (lung or pulmonary):
      • NOS
      • centriacinar
      • centrilobular
      • obstructive
      • panacinar
      • panlobular
      • unilateral
      • vesicular
    • MacLeod's syndrome
    • Swyer-James syndrome
    • Unilateral hyperlucent lung
    • Excludes: emphysema:
      • with both acute and chronic bronchitis (491.21)
      • with chronic bronchitis (491.2)
      • compensatory (518.2)
      • due to fumes and vapors (506.4)
      • interstitial (518.1)
        • newborn (770.2)
      • mediastinal (518.1)
      • surgical (subcutaneous) (998.81)
      • traumatic (958.7)
      • with chronic bronchitis (491.20)
• 493 Asthma
  • The following fifth-digit subclassification is for use with category
  • 493:
    • 0 without mention of status asthmaticus
    • 1 with status asthmaticus
  • 493.0 Extrinsic asthma
    • Asthma:
      • allergic with stated cause
      • atopic
      • childhood
      • hay
      • platinum
    • Hay fever with asthma
    • Excludes: asthma:
      • allergic NOS (493.9)
      • detergent (507.8)
      • miners' (500)
      • wood (495.8)
  • 493.1 Intrinsic asthma
    • Late-onset asthma
  • 493.2 Chronic obstructive asthma
    • Asthma with chronic obstructive pulmonary disease (COPD)
    • Excludes: chronic asthmatic bronchitis (491.2)
      • chronic obstructive bronchitis (491.2)
  • 493.9 Asthma, unspecified
    • Asthma (bronchial) (allergic NOS)
    • Bronchitis:
      • allergic
      • asthmatic
• 494 Bronchiectasis
  • Bronchiectasis (fusiform) (postinfectious) (recurrent)
  • Bronchiolectasis
  • Excludes: congenital (748.61)
    • tuberculous bronchiectasis (current disease) (011.5)
• 495 Extrinsic allergic alveolitis
  • Includes: allergic alveolitis and pneumonitis due to inhaled organic dust particles of fungal, thermophilic actinomycete, or other origin
  • 495.0 Farmers' lung
  • 495.1 Bagassosis
  • 495.2 Bird-fanciers' lung
    • Budgerigar-fanciers' disease or lung
    • Pigeon-fanciers' disease or lung
  • 495.3 Suberosis
    • Cork-handlers' disease or lung
  • 495.4 Malt workers' lung
    • Alveolitis due to Aspergillus clavatus
  • 495.5 Mushroom workers' lung
  • 495.6 Maple bark-strippers' lung
    • Alveolitis due to Cryptostroma corticale
  • 495.7 "Ventilation" pneumonitis
    • Allergic alveolitis due to fungal, thermophilic actinomycete, and other organisms growing in ventilation [air conditioning] systems
  • 495.8 Other specified allergic alveolitis and pneumonitis
    • Cheese-washers' lung
    • Coffee workers' lung
    • Fish-meal workers' lung
    • Furriers' lung
    • Grain-handlers' disease or lung
    • Pituitary snuff-takers' disease
    • Sequoiosis or red-cedar asthma
    • Wood asthma
  • 495.9 Unspecified allergic alveolitis and pneumonitis
    • Alveolitis, allergic (extrinsic)
    • Hypersensitivity pneumonitis
• 496 Chronic airway obstruction, not elsewhere classified
  • Note: This code is not to be used with any code from categories 491-493
    • Chronic:
      • nonspecific lung disease
      • obstructive lung disease
      • obstructive pulmonary disease [COPD] NOS
  • Excludes: chronic obstructive lung disease [COPD] specified (as) (with):
    • allergic alveolitis (495.0-495.9)
    • asthma (493.2)
    • bronchiectasis (494)
    • bronchitis (491.20-491.21) with emphysema (491.20-491.21)
    • emphysema (492.0-492.8)