2024 ICD-10-CM Diagnosis Code B25.9

Cytomegaloviral disease, unspecified

ICD-10-CM Code:
ICD-10 Code for:
Cytomegaloviral disease, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Certain infectious and parasitic diseases
    • Other viral diseases
      • Cytomegaloviral disease

B25.9 is a billable diagnosis code used to specify a medical diagnosis of cytomegaloviral disease, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like B25.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Cytomegalovirus infection
  • Cytomegalovirus infection of skin
  • Cytomegalovirus infection of the central nervous system
  • Cytomegalovirus viremia
  • Disseminated cytomegalovirus infection
  • Infection caused by Cytomegalovirus co-occurrent with human immunodeficiency virus infection
  • Myelitis caused by Cytomegalovirus
  • Myelitis caused by Human herpes virus
  • Ulcer of skin caused by Cytomegalovirus
  • Ulcerative cytomegalovirus lesion
  • Viremia

Clinical Classification

Clinical Information

  • Viremia

    the presence of viruses in the blood.
  • Adenovirus DNA Viremia|AdV DNA Viremia

    a laboratory test result indicating the presence of adenovirus dna in the blood.
  • Grade 2 Viremia, CTCAE|Grade 2 Viremia

    moderate symptoms; medical intervention indicated
  • Grade 3 Viremia, CTCAE|Grade 3 Viremia

    severe or medically significant but not immediately life-threatening; hospitalization or prolongation of existing hospitalization indicated
  • Viremia

    a laboratory test result indicating the presence of a virus in the blood.
  • Viremia, CTCAE|Viremia

    a disorder characterized by the presence of a virus in the blood stream.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert B25.9 to ICD-9-CM

  • ICD-9-CM Code: 078.5 - Cytomegaloviral disease
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education

Cytomegalovirus Infections

Cytomegalovirus (CMV) is a virus found around the world. It is related to the viruses that cause chickenpox and infectious mononucleosis (mono). Between 50% and 80% of adults in the United States have had a CMV infection by age 40. Once CMV is in a person's body, it stays there for life.

CMV is spread through close contact with body fluids. Most people with CMV don't get sick and don't know that they've been infected. But infection with the virus can be serious in babies and people with weak immune systems. If a woman gets CMV when she is pregnant, she can pass it on to her baby. Usually the babies do not have health problems. But some babies can develop lifelong disabilities.

A blood test can tell whether a person has ever been infected with CMV. Most people with CMV don't need treatment. If you have a weakened immune system, your doctor may prescribe antiviral medicine. Good hygiene, including proper hand washing, may help prevent infections.

Centers for Disease Control and Prevention

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.