ICD-10-CM Code B33

Other viral diseases, not elsewhere classified

Version 2020 Non-Billable Code

Not Valid for Submission

B33 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of other viral diseases, not elsewhere classified. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:B33
Short Description:Other viral diseases, not elsewhere classified
Long Description:Other viral diseases, not elsewhere classified

Consider the following ICD-10 codes with a higher level of specificity:

  • B33.0 - Epidemic myalgia
  • B33.1 - Ross River disease
  • B33.2 - Viral carditis
  • B33.20 - Viral carditis, unspecified
  • B33.21 - Viral endocarditis
  • B33.22 - Viral myocarditis
  • B33.23 - Viral pericarditis
  • B33.24 - Viral cardiomyopathy
  • B33.3 - Retrovirus infections, not elsewhere classified
  • B33.4 - Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS]
  • B33.8 - Other specified viral diseases

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Other viral diseases (B25-B34)
      • Other viral diseases, not elsewhere classified (B33)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Viral Infections

Viruses are very tiny germs. They are made of genetic material inside of a protein coating. Viruses cause familiar infectious diseases such as the common cold, flu and warts. They also cause severe illnesses such as HIV/AIDS, smallpox, and Ebola.

Viruses are like hijackers. They invade living, normal cells and use those cells to multiply and produce other viruses like themselves. This can kill, damage, or change the cells and make you sick. Different viruses attack certain cells in your body such as your liver, respiratory system, or blood.

When you get a virus, you may not always get sick from it. Your immune system may be able to fight it off.

For most viral infections, treatments can only help with symptoms while you wait for your immune system to fight off the virus. Antibiotics do not work for viral infections. There are antiviral medicines to treat some viral infections. Vaccines can help prevent you from getting many viral diseases.


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