ICD-10 B27.00
Billable / SpecificGammaherpesviral mononucleosis without complication
About ICD-10-CM B27.00
ICD-10-CM code B27.00 represents Gammaherpesviral mononucleosis without complication. This is a billable/specific code in the Infectious and Parasitic Diseases chapter (block B27). The 2026 edition of ICD-10-CM B27.00 became effective on October 1, 2025.
Medicare LCD Coverage for B27.00
Local Coverage Determinations (LCDs) from CMS MACs that list B27.00 as a covered diagnosis.
Showing top 10 of 13 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing B27.00.
2 Medicare
CPT Codes Commonly Billed with B27.00
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- J9311 CMS LCD: Billing and Coding: Rituximab CMS LCD
- J3590 CMS LCD: Billing and Coding: Rituximab CMS LCD
- J9190 CMS LCD: Billing and Coding: Chemotherapy Agents for Non-Oncologic Conditions CMS LCD
- J9260 CMS LCD: Billing and Coding: Chemotherapy Agents for Non-Oncologic Conditions CMS LCD
- J9215 CMS LCD: Billing and Coding: Chemotherapy Agents for Non-Oncologic Conditions CMS LCD
Convert B27.00 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| B27.00 | 075 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To B27.00
Other codes in section B25-B34 (Other viral diseases).
ICD-10 B27.00, Billing FAQ
Is ICD-10 code B27.00 billable? +
Yes, B27.00 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What CPT codes are commonly billed with B27.00? +
Procedures frequently paired with B27.00 include: J9311, J3590, J9190, J9260, J9215.
What ICD-9 codes does B27.00 map to? +
Per CMS GEMs, B27.00 maps to ICD-9 codes: 075. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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