B01.2 Varicella pneumonia

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

MS-DRG index

Defines the logic of DRG(s) 177-179 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 052.1 Varicella (hemorrhagic) pneumonitis

Code annotations containing back-references to B01.2

Back-references to B01.2

• Type 1 Excludes: J17 Pneumonia in diseases classified elsewhere ("varicella pneumonia (B01.2)")

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 B01.2

• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › in (due to) › chickenpox
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › in (due to) › varicella
• Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) › varicella
• Varicella › with › pneumonia

Nearby codes

• B01 Varicella [chickenpox]
• B01.0 Varicella meningitis
• B01.1 Varicella encephalitis, myelitis and encephalomyelitis
• B01.11 Varicella encephalitis and encephalomyelitis
• B01.12 Varicella myelitis
• B01.2 Varicella pneumonia (this code)
• B01.8 Varicella with other complications
• B01.81 Varicella keratitis
• B01.89 Other varicella complications
• B01.9 Varicella without complication