2008 ICD-9-CM Volume 1 Diagnosis CodesHome > Diseases Of The Respiratory System 460-519 > Chronic Obstructive Pulmonary Disease And Allied Conditions 490-496 >
2008 ICD-9-CM Diagnosis 491
Chronic bronchitis
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 Therefore, this code may be out of date.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 491 can be accessed here.
A subcategory of CHRONIC OBSTRUCTIVE PULMONARY DISEASE. The disease is characterized by hypersecretion of mucus accompanied by a chronic (more than 3 months in 2 consecutive years) productive cough. Infectious agents are a major cause of chronic bronchitis.
491 is a non-specific code that cannot be used to specify a diagnosis
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2008 ICD-9-CM Diagnosis 491
On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date.