Flu ICD-10-CM Codes

Get up to speed with the latest and most accurate Flu ICD-10-CM codes. Enhance your medical billing proficiency and clinical documentation expertise.

By Liliana Braun on Feb 29, 2024.

Fact Checked by Ericka Pingol.

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Flu ICD-10-CM Codes

What ICD-10 Codes Are Used for Flu?

Accurate and specific codes are essential when documenting cases related to Flu ICD codes. Here are a few commonly used ones:

  • J11.1 - Influenza due to unidentified influenza virus with other respiratory manifestations: Used when flu symptoms are present with other respiratory manifestations, and the exact strain of influenza virus is unknown.
  • J11.0 - Influenza due to unidentified influenza virus with pneumonia: This code applies when a patient has pneumonia, but the exact strain of the influenza virus is unknown.
  • J10.1 - Influenza due to other identified influenza virus with other respiratory manifestations: This is used when the influenza virus strain is known and the patient has other respiratory symptoms.
  • J10.0 - Influenza due to other identified influenza virus with pneumonia: This code applies when the patient has influenza with pneumonia and the identified influenza virus strain is known.
  • J09.X2 - Influenza due to novel influenza A virus with gastrointestinal manifestations: Used when a patient has influenza A with gastrointestinal symptoms.

Which Flu ICD Codes Are Billable?

The following flu ICD codes can be billed; here's an introduction to their specific usage:

  • J11.1: Yes, billable. It signifies an unidentified influenza virus with additional respiratory symptoms.
  • J11.0: Yes, billable. This code is recognized for cases involving unidentified influenza with pneumonia.
  • J10.1: Yes, billable. It applies to identified influenza viruses with additional respiratory manifestations.
  • J10.0: Yes, billable. It is used for cases of known influenza virus with pneumonia.
  • J09.X2: Yes, billable. It identifies cases of influenza A virus with gastrointestinal symptoms.

Clinical Information

The flu, or influenza, is a viral illness that typically affects the respiratory tract. It is highly contagious and can have varying degrees of severity. Here are some key points:

  • The flu is most often transmitted through respiratory droplets when a person with the flu coughs, sneezes, or talks.
  • Common symptoms include fever, cough, sore throat, runny or stuffy nose, body aches, headache, chills, fatigue, and sometimes, diarrhea and vomiting.
  • Complications can include bacterial pneumonia, ear infections, sinus infections, and worsening of chronic medical conditions.
  • People at high risk for complications include the young, the elderly, pregnant women, and people with certain chronic health conditions.
  • Vaccination is the primary method of prevention. Antiviral medications can be effective if started early in the course of illness.

Synonyms Include:

  • Influenza
  • Grippe
  • Influenza virus infection
  • Flu virus infection
  • Seasonal influenza
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Commonly asked questions

What is the difference between the common cold and the flu?

While both are respiratory illnesses, they are caused by different viruses. Flu symptoms are generally more severe than the common cold and may lead to serious health complications like pneumonia.

How effective is the flu vaccine?

The effectiveness of the flu vaccine can vary each year and depends on the similarity between the viruses included in the vaccine and those circulating during the flu season.

Can you get the flu from the flu vaccine?

No, you cannot get the flu from the vaccine. Some people may experience mild side effects such as low-grade fever and muscle aches following vaccination, but these are not the same as having the flu.

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