ICD-10 B34
Non-Billable HeaderViral infection of unspecified site
About ICD-10-CM B34
ICD-10-CM code B34 represents Viral infection of unspecified site. This is a non-billable header code in the Infectious and Parasitic Diseases chapter (block B34). The 2026 edition of ICD-10-CM B34 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 B34. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- anogenital human papillomavirus infection (A63.0)
- cytomegaloviral disease NOS (B25.9)
- herpesvirus [herpes simplex] infection NOS (B00.9)
- retrovirus infection NOS (B33.3)
- viral agents as the cause of diseases classified elsewhere (B97.-)
- viral warts due to human papillomavirus infection (B07)
Medicare LCD Coverage for B34
Local Coverage Determinations (LCDs) from CMS MACs that list B34 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 B34.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but B34 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with B34
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 B34
Other codes in section B25-B34 (Other viral diseases).
ICD-10 B34, Billing FAQ
Is ICD-10 code B34 billable? +
No, B34 is a non-billable header code. Use a more specific child code from block B34 when submitting claims.
What codes are Type 1 Excludes for B34? +
Type 1 Excludes (never code together with B34): anogenital human papillomavirus infection (A63.0); cytomegaloviral disease NOS (B25.9); herpesvirus [herpes simplex] infection NOS (B00.9)
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team