491.1
ICD-9-CMThis code signifies a persistent inflammation of the bronchial tubes characterized by the production of mucus and pus. It indicates a chronic respiratory condition where the airways are irritated and infected, leading to ongoing cough and sputum production.
Apply this code when documentation explicitly states "mucopurulent chronic bronchitis" or describes chronic bronchitis with clear evidence of purulent sputum. This code is appropriate for patients experiencing recurrent or continuous productive cough with purulent discharge for at least three months of the year, for two consecutive years.
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