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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Chronic Obstructive Pulmonary Disease And Allied Conditions 490-496 > 2008 ICD-9-CM Diagnosis 496 Chronic airway obstruction not elsewhere classified  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 496 can be accessed here. A disease of chronic diffuse irreversible airflow obstruction. Subcategories of COPD include CHRONIC BRONCHITIS and PULMONARY EMPHYSEMA. Acronym for Diffuse Obstructive Pulmonary Syndrome. 496 is a specific code that can be used to specify a diagnosis 496 contains 14 index entries Note : This code is not to be used with any code from categories 491-493 496 also known as: Chronic: nonspecific lung disease obstructive lung disease obstructive pulmonary disease [COPD] NOS 496 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) Index entries containing 496: Bronchorrhea (chronic) (purulent) 491.0 acute 466.0 with chronic obstructive pulmonary disease (COPD) 496 Disease, diseased - see also Syndrome lung NEC 518.89 nonspecific, chronic 496 obstructive (chronic) (COPD) 496 with acute bronchitis 491.22 exacerbation NEC 491.21 alveolitis, allergic (see also Alveolitis, allergic) 495.9 asthma (chronic) (obstructive) 493.2 bronchiectasis 494.0 with acute exacerbation 494.1 bronchitis (chronic) 491.20 with acute bronchitis 491.22 exacerbation (acute) 491.21 decompensated 491.21 with exacerbation 491.21 with exacerbation (acute) 491.21 emphysema NEC 492.8 diffuse (with fibrosis) 496 pulmonary - see also Disease, lung diffuse obstructive (chronic) 496 with acute bronchitis 491.22 asthma (chronic) (obstructive) 493.2 exacerbation NEC (acute) 491.21 obstructive diffuse (chronic) 496 with acute bronchitis 491.22 asthma (chronic) (obstructive) 493.2 bronchitis (chronic) 491.20 acute 491.22 exacerbation NEC (acute) 491.21 decompensated 491.21 with exacerbation 491.21 respiratory (tract) 519.9 obstructive 496 DOPS (diffuse obstructive pulmonary syndrome) 496 Obstruction, obstructed, obstructive airway NEC 519.8 chronic 496 with allergic alveolitis NEC 495.5 asthma NEC (see also Asthma) 493.2 bronchiectasis 494.0 with acute exacerbation 494.1 bronchitis (chronic) (see also Bronchitis, chronic, obstructive) 491.20 emphysema NEC 492.8 lung 518.89 airway, chronic 496 chronic NEC 496 with asthma (chronic) (obstructive) 493.2 disease, chronic 496 with asthma (chronic) (obstructive) 493.2 respiratory 519.8 chronic 496 Syndrome - see also Disease diffuse obstructive pulmonary 496