2024 ICD-10-CM Diagnosis Code B27.1

by

Cytomegaloviral mononucleosis

  • B27.1 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2024 edition of ICD-10-CM B27.1 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of B27.1 – other international versions of ICD-10 B27.1 may differ.

The following code(s) above B27.1 contain annotation back-references

 that may be applicable to B27.1:

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

Code 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

Code annotations containing back-references to B27.1:

  • Type 1 Excludes: B25