Influenza (flu) is a highly contagious viral infection that is one of the most severe illnesses of the winter season. Influenza is spread easily from person to person, usually when an infected person coughs or sneezes. Pneumonia is a serious infection or inflammation of the lungs.
Influenza due to identified novel influenza A virus ICD-10-CM J09. X2 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
Influenza virus infection alone can cause severe pneumonia and ARDS, but it can also act in conjunction with a bacterial infection (discussed below). It can precede a pneumonia episode caused by a secondary bacterial infection, most commonly by S. aureus and S.
J10. 1 Influenza with other respiratory manifestations, seasonal influenza virus identified. Influenzal: acute upper respiratory infection.
ICD-10 code J18. 9 for Pneumonia, unspecified organism is a medical classification as listed by WHO under the range - Diseases of the respiratory system .
The CPT® code modifier 59 is used to identify a distinct procedural service. In the context of influenza immunoassay testing, it supports coding CPT® 87400 once for influenza type A and once for influenza type B.
Pneumonia and the flu are not the same thing, of course. The flu is a viral infection caused by the flu virus, and pneumonia is usually caused by bacteria like Streptococcus pneumoniae (sometimes also called pneumococcus).
Although the body would usually be able to fight the buildup away, influenza changes that. With a weakened immune system, your body may not be able to get over the foreign bacteria and viruses. This is how those with influenza can easily turn their flu into something much worse — pneumonia.
Epidemiology of secondary bacterial pneumonia Primary influenza virus infection may lead to lower respiratory tract symptoms, but secondary bacterial infections during and shortly after recovery from influenza virus infection are a much more common cause of pneumonia.
J20. 1 Acute bronchitis due to Hemophilus influenzae...
Most influenza infections affect the upper respiratory tract, while lower tract infection typically represents extension from upper airways and may be diagnosed with lower respiratory sampling such as bronchoscopy.
Type A influenza is generally considered worse than type B influenza. This is because the symptoms are often more severe in type A influenza than in type B influenza. Type A influenza is more common than type B influenza. Researchers suggest that most adults have considerable immunity against type B influenza.