B27.00: Gammaherpesviral mononucleosis without complication
B27.00 is the billable ICD-10-CM diagnosis code for Gammaherpesviral mononucleosis without complication. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code B27.00?
B27.00 is the ICD-10-CM diagnosis code for Gammaherpesviral mononucleosis without complication. It belongs to category B27 (Infectious mononucleosis).
Is B27.00 a billable code?
Yes. B27.00 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does B27.00 belong to?
B27.00 is part of ICD-10-CM category B27 — Infectious mononucleosis, which has 32 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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