ICD-10 B25
Non-Billable HeaderCytomegaloviral disease
About ICD-10-CM B25
ICD-10-CM code B25 represents Cytomegaloviral disease. This is a non-billable header code in the Infectious and Parasitic Diseases chapter (block B25). The 2026 edition of ICD-10-CM B25 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 1 Excludes
Pure excludes, these codes can never be coded together with B25. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- congenital cytomegalovirus infection (P35.1)
- cytomegaloviral mononucleosis (B27.1-)
Medicare LCD Coverage for B25
Local Coverage Determinations (LCDs) from CMS MACs that list B25 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing B25.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but B25 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with B25
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To B25
Other codes in section B25-B34 (Other viral diseases).
ICD-10 B25, Billing FAQ
Is ICD-10 code B25 billable? +
No, B25 is a non-billable header code. Use a more specific child code from block B25 when submitting claims.
What codes are Type 1 Excludes for B25? +
Type 1 Excludes (never code together with B25): congenital cytomegalovirus infection (P35.1); cytomegaloviral mononucleosis (B27.1-)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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