NPI Atlas

B25 – Cytomegaloviral disease

ICD-10-CM 2027 diagnosis code · Other viral diseases

Non-billable header

ICD-10-CM code B25

Code: B25 (claims format: B25)
Description: Cytomegaloviral disease
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: B25-B34 Other viral diseases

Billable codes under B25

B25 is a header code and cannot be used on claims. Choose the most specific code:

B25.0 – Cytomegaloviral pneumonitisBillable
B25.1 – Cytomegaloviral hepatitisBillable
B25.2 – Cytomegaloviral pancreatitisBillable
B25.8 – Other cytomegaloviral diseasesBillable
B25.9 – Cytomegaloviral disease, unspecifiedBillable

Notes for B25

Excludes1 (not coded here):

congenital cytomegalovirus infection (P35.1)
cytomegaloviral mononucleosis (B27.1-)

Frequently asked questions

What is ICD-10 code B25?

B25 is the ICD-10-CM code for cytomegaloviral disease, in the block B25-B34 (Other viral diseases).

Is B25 a billable code?

No. B25 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.