Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes A00-B99 – Certain infectious and parasitic diseases (A00-B99) > 2024 ICD-10-CM Codes B25-B34 – Other viral diseases (B25-B34) > 2024 ICD-10-CM Codes B27 – Infectious mononucleosis (B27) > 2024 ICD-10-CM Codes B27.9 – Infectious mononucleosis, unspecified (B27.9)