496 Chronic airway obstruction, not elsewhere classified
Chronic:
nonspecific lung disease
obstructive lung disease
obstructive pulmonary disease [COPD] NOS
Note: This code is not to be used with any code from categories 491-493
Excludes:
chronic obstructive lung disease [COPD] specified (as) (with):
allergic alveolitis (495.0-495.9)
asthma (493.2)
bronchiectasis (494.0-494.1)
bronchitis (491.20-491.22)
with emphysema (491.20-491.22)
decompensated (491.21)
emphysema (492.0-492.8)