Other infectious mononucleosis without complication

This code signifies a diagnosis of infectious mononucleosis caused by agents other than the Epstein-Barr virus (EBV), such as cytomegalovirus (CMV) or toxoplasmosis, where no specific complications are documented. It indicates a systemic viral illness characterized by fever, fatigue, pharyngitis, and lymphadenopathy.

Apply this code when the medical record clearly states a diagnosis of infectious mononucleosis, and laboratory testing or clinical presentation confirms a non-EBV etiology. Documentation should explicitly rule out complications such as splenic rupture, hepatitis, or neurological involvement.

• Ensure the documentation specifies "other" infectious mononucleosis, differentiating it from EBV-related mononucleosis (B27.0-).
• Do not use this code if specific complications of mononucleosis are present; instead, code the complication along with the appropriate mononucleosis code.
• Confirm that the provider's documentation supports the absence of complications, often indicated by "uncomplicated" or no mention of specific sequelae.