B01.9 Varicella without complication

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Varicella NOS

MS-DRG index

Defines the logic of DRG(s) 791 in MDC 15.

Approximate ICD-9-CM (GEMs)

• 052.9 Varicella without mention of complication

Code annotations containing back-references to B01.9

Back-references to B01

• Type 2 Excludes: B10 Other human herpesviruses ("human herpesvirus 3 (B01.-, B02.-)")
• Type 2 Excludes: B10 Other human herpesviruses ("varicella (B01.-)")
• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")

Diagnosis Index entries for B01.9

• Infection, infected, infective (opportunistic) › varicella
• Varicella

Nearby codes

• B01.12 Varicella myelitis
• B01.2 Varicella pneumonia
• B01.8 Varicella with other complications
• B01.81 Varicella keratitis
• B01.89 Other varicella complications
• B01.9 Varicella without complication (this code)