2024 ICD-10-CM Diagnosis Code B27.09

Gammaherpesviral mononucleosis with other complications

• B27.09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2024 edition of ICD-10-CM B27.09 became effective on October 1, 2023.
• This is the American ICD-10-CM version of B27.09 – other international versions of ICD-10 B27.09 may differ.

Applicable To

• Hepatomegaly in gammaherpesviral mononucleosis

The following code(s) above B27.09 contain annotation back-references

 that may be applicable to B27.09:

• A00-B99  Certain infectious and parasitic diseases
• B27  Infectious mononucleosis
• B27.0  Gammaherpesviral mononucleosis

Approximate Synonyms

• Gamma herpes mononucleosis w hepatomegaly
• Hepatomegaly due to gamma herpes mononucleosis

ICD-10-CM B27.09 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

• 865 Viral illness with mcc
• 866 Viral illness without mcc

Convert B27.09 to ICD-9-CMCode History

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change
• 2024 (effective 10/1/2023): No change

Diagnosis Index entries containing back-references to B27.09:

• Adenitis – see also Lymphadenitis
  • epidemic, acute B27.09
  • infectious B27.09 (acute) (epidemic)
• Hepatomegaly – see also Hypertrophy, liver
  • in mononucleosis
    • gammaherpesviral B27.09
• Mononucleosis, infectiousB27.90
  • Epstein-Barr (virus) B27.00
    • with
      • complication NEC B27.09
  • gammaherpesviralB27.00
    • with
      • complication NEC B27.09