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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Pneumonia And Influenza 480-488 > ICD-9-CM Diagnosis 487 Influenza An acute viral infection involving the respiratory tract. It is marked by inflammation of the nasal mucosa, the pharynx, and conjunctiva, and by headache and severe, often generalized, myalgia. 487 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 487.0 Influenza with pneumonia 487.0 is a specific code that can be used to specify a diagnosis 487.0 contains 16 index entries ICD-9-CM Diagnosis 487.1 Influenza with other respiratory manifestations An acute viral infection involving the respiratory tract. It is marked by inflammation of the nasal mucosa, the pharynx, and conjunctiva, and by headache and severe, often generalized, myalgia. 487.1 is a specific code that can be used to specify a diagnosis 487.1 contains 53 index entries ICD-9-CM Diagnosis 487.8 Influenza with other manifestations 487.8 is a specific code that can be used to specify a diagnosis 487.8 contains 14 index entries