B33.23 Viral pericarditis

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

Applies from B33.2 Viral carditis

Applicable to

• Coxsackie (virus) carditis

MS-DRG index

Defines the logic of DRG(s) 314-316 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 074.21 Coxsackie pericarditis (approximate)

Code annotations containing back-references to B33.23

Back-references to B33.23

• Type 1 Excludes: I30 Acute pericarditis ("viral pericarditis due to Coxsackie virus (B33.23)")
• Type 1 Excludes: I32 Pericarditis in diseases classified elsewhere ("coxsackie (virus) (B33.23)")
• Code Also: M35.81 Multisystem inflammatory syndrome ("viral pericarditis (B33.23)")

Back-references to B33

• Code First: H67 Otitis media in diseases classified elsewhere ("viral disease NEC (B00-B34)")

Diagnosis Index entries for B33.23

• Coxsackie (virus) (infection) › pericarditis
• Pericarditis (with decompensation) (with effusion) › coxsackie

Nearby codes

• B33.1 Ross River disease
• B33.2 Viral carditis
• B33.20 Viral carditis, unspecified
• B33.21 Viral endocarditis
• B33.22 Viral myocarditis
• B33.23 Viral pericarditis (this code)
• B33.24 Viral cardiomyopathy
• B33.3 Retrovirus infections, not elsewhere classified
• B33.4 Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS]
• B33.8 Other specified viral diseases