Cytomegaloviral disease (B25) ICD-10-CM
The B25 code range covers cytomegaloviral disease with 6 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the B25 Range 6 codes · 5 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the B25 range.
Viremia
The presence of viruses in the blood.
About the B25 Code Range
The ICD-10 code B25 and its subcodes are used specifically to classify diseases caused by cytomegalovirus (CMV), a common virus that can lead to a range of infections affecting various organs. These codes help document the presence and type of cytomegaloviral disease in patients.
This section covers different manifestations of cytomegaloviral disease. The primary code B25 represents cytomegaloviral disease in general. More specific codes include B25.0 for cytomegaloviral pneumonitis (also known as cytomegaloviral pneumonia), B25.1 for cytomegaloviral hepatitis (or cytomegalovirus hepatitis), and B25.2 for cytomegaloviral pancreatitis, sometimes called infectious pancreatitis. The code B25.8 encompasses a wide variety of other cytomegaloviral conditions affecting different body systems such as the eyes (cytomegaloviral retinitis or chorioretinitis), the nervous system, skin, and gastrointestinal tract. Finally, B25.9 is used when cytomegaloviral disease is present but unspecified, including cases like cytomegalovirus viremia or disseminated CMV infection. Understanding these distinctions helps coders accurately assign the right ICD-10 code for CMV infections diagnosed in clinical settings.
Questions About This Page
How many billable codes are in the B25 range?
Of the 6 codes in this range, 5 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the B25 range classify?
The range classifies cytomegaloviral disease. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
