B27.1
Non-billableCytomegaloviral mononucleosis
B27.1 is the ICD-10-CM code for Cytomegaloviral mononucleosis. It is a non-billable category code — use a more specific child code such as B27.10 for billing.
A00-B99 Certain infectious and parasitic diseases
What this means — in plain language
MedlinePlus · NIHWhat is infectious mononucleosis (mono)? Infectious mononucleosis (mono) is a disease caused by viruses .The most common cause is the Epstein-Barr virus (EBV). Mono is contagious, which means it can spread from person to person. It is common among teenagers and young adults, especially college students. What causes infectious mononucleosis (mono)? Mono can be caused by many different viruses. But it is most often…
Read more about Infectious Mononucleosis at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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