Cytomegaloviral mononucleosis without complications

This code signifies an acute infectious condition caused by the cytomegalovirus (CMV), presenting with symptoms characteristic of mononucleosis, such as fever, fatigue, and lymphadenopathy. It specifically indicates that no further complications, like hepatitis, pneumonitis, or retinitis, are documented.

Apply this code when documentation confirms a diagnosis of CMV infection manifesting as mononucleosis, and the physician explicitly states or implies the absence of associated complications. This is typically supported by positive CMV serology (e.g., IgM antibodies) and a clinical picture consistent with mononucleosis.

• Ensure documentation clearly specifies "without complications" or lacks any mention of specific CMV-related organ involvement.
• Do not use this code if the patient has any documented CMV-related complications; instead, select a more specific code from the B27.1 series.
• Consider sequencing this code as the primary diagnosis if it is the reason for the encounter.