ICD-10 Code B01.8 – Varicella with other complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B01.8 – Varicella with other complications
What it is
B01.8 identifies varicella, or chickenpox, when the infection causes complications not classified elsewhere. Use it when the record documents varicella plus an additional complication that is not separately coded.
Clinical signs
Typical findings include the characteristic vesicular rash of varicella along with evidence of a complication. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents chickenpox with another complication and does not assign a more specific varicella code. It may apply when the complication is described in the note but lacks a separate, more specific ICD-10-CM option.
Code the documented complication separately when instructed by the record and coding rules. If the chart only says “varicella” without a complication, choose the uncomplicated varicella code instead.
Do not use for
Do not use B01.8 for uncomplicated chickenpox or for complications that have a more specific varicella code. Check documentation if the record is unclear.
Coding tip
Look for the exact complication documented and confirm whether it is coded separately before assigning B01.8.