ICD-10 Code B01.89 – Other varicella complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B01.89 – Other varicella complications
What it is
This code identifies complications caused by varicella (chickenpox) that are not classified elsewhere. Use it when the chart documents a varicella-related problem, but a more specific complication code is not available.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a recent or active varicella infection with an associated complication such as involvement of another organ system or an unusual secondary condition.
When to use this code
Use B01.89 when the provider clearly links the complication to varicella and the record does not support a more specific ICD-10-CM option. It may apply to atypical or unspecified varicella complications documented after evaluation. Code the complication only when the relationship to varicella is stated or clearly implied.
Do not use for
Do not use this code for uncomplicated chickenpox or for complications that have a specific ICD-10-CM code. Check documentation if the condition is better described as a different viral infection or a non-varicella diagnosis.
Coding tip
Search the note for the exact complication first; if a specific code exists, use it instead of B01.89.