I32 Pericarditis in diseases classified elsewhere

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

Excludes1 (never code together)

• pericarditis (in):
• coxsackie (virus) (B33.23)
• gonococcal (A54.83)
• meningococcal (A39.53)
• rheumatoid (arthritis) (M05.31)
• syphilitic (A52.06)
• systemic lupus erythematosus (M32.12)
• tuberculosis (A18.84)

Code first

• underlying disease

Applies from I32 Pericarditis in diseases classified elsewhere

Excludes1 (never code together)

• pericarditis (in):
• coxsackie (virus) (B33.23)
• gonococcal (A54.83)
• meningococcal (A39.53)
• rheumatoid (arthritis) (M05.31)
• syphilitic (A52.06)
• systemic lupus erythematosus (M32.12)
• tuberculosis (A18.84)

Code first

• underlying disease

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 420.0 Acute pericarditis in diseases classified elsewhere (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Code annotations containing back-references to I32

Back-references to I32

• Use Additional: B39 Histoplasmosis ("pericarditis (I32)")

Back-references to I32

• Use Additional: B39 Histoplasmosis ("pericarditis (I32)")

Diagnosis Index entries for I32

• Pericarditis (with decompensation) (with effusion) › uremic

Nearby codes

• I32 Pericarditis in diseases classified elsewhere (this code)