ICD-10-CM Code B27.0

Gammaherpesviral mononucleosis

Version 2020 Non-Billable Code

Not Valid for Submission

B27.0 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of gammaherpesviral mononucleosis. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:B27.0
Short Description:Gammaherpesviral mononucleosis
Long Description:Gammaherpesviral mononucleosis

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

  • B27.00 - Gammaherpesviral mononucleosis without complication
  • B27.01 - Gammaherpesviral mononucleosis with polyneuropathy
  • B27.02 - Gammaherpesviral mononucleosis with meningitis
  • B27.09 - Gammaherpesviral mononucleosis with other complications

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code B27.0:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Mononucleosis due to Epstein-Barr virus

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Other viral diseases (B25-B34)
      • Infectious mononucleosis (B27)

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


Infectious Mononucleosis

Infectious mononucleosis, or "mono", is an infection usually caused by the Epstein-Barr virus. The virus spreads through saliva, which is why it's sometimes called "kissing disease." Mono occurs most often in teens and young adults. However, you can get it at any age. Symptoms of mono include

  • Fever
  • Sore throat
  • Swollen lymph glands

Sometimes you may also have a swollen spleen. Serious problems are rare.

A blood test can show if you have mono. Most people get better in two to four weeks. However, you may feel tired for a few months afterward. Treatment focuses on helping symptoms and includes medicines for pain and fever, warm salt water gargles and plenty of rest and fluids.


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