Other infectious mononucleosis with polyneuropathy

This code signifies a diagnosis of infectious mononucleosis, caused by the Epstein-Barr virus (EBV), that is complicated by the development of polyneuropathy. Polyneuropathy refers to a generalized disorder of peripheral nerves, manifesting as weakness, numbness, or pain, affecting multiple nerves throughout the body. This represents a neurological complication directly attributed to the mononucleosis infection.

Use this code when documentation clearly states a diagnosis of infectious mononucleosis and explicitly links it to the presence of polyneuropathy. This typically applies to patients experiencing neurological symptoms such as paresthesias, motor weakness, or sensory deficits in multiple limbs during or shortly after an acute EBV infection. Physician notes should confirm the infectious mononucleosis and the associated polyneuropathy.

• Ensure the documentation explicitly states the link between the infectious mononucleosis and the polyneuropathy; do not assume causation.
• Do not use this code for mononeuropathy or other localized neurological complications; polyneuropathy must be specified.
• Consider sequencing this code as the primary diagnosis if the polyneuropathy is the main reason for the encounter, otherwise, sequence it after the acute infectious mononucleosis (B27.0x or B27.1x).