Varicella without complication

This code represents a primary infection with the varicella-zoster virus, commonly known as chickenpox, when there are no associated complications such as pneumonia, encephalitis, or secondary bacterial infections. It indicates a typical, self-limiting course of the disease.

Assign this code for patients presenting with characteristic signs and symptoms of chickenpox, including a pruritic vesicular rash, fever, and malaise, when the medical record explicitly states the absence of complications. Documentation should confirm a diagnosis of varicella and rule out any secondary conditions.

• Do not use this code if any complications of varicella are documented; instead, code the specific complication.
• This code is for active infection; for sequelae of varicella, refer to codes in chapter B02.
• Ensure the documentation clearly distinguishes between varicella and herpes zoster (shingles), which is caused by reactivation of the same virus.