I01.0 Acute rheumatic pericarditis

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

Applicable to

• Any condition in I00 with pericarditis
• Rheumatic pericarditis (acute)

Excludes1 (never code together)

• acute pericarditis not specified as rheumatic (I30.-)

Applies from I01 Rheumatic fever with heart involvement

Excludes1 (never code together)

• chronic diseases of rheumatic origin (I05-I09) unless rheumatic fever is also present or there is evidence of reactivation or activity of the rheumatic process.

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 391.0 Acute rheumatic pericarditis

Code annotations containing back-references to I01.0

Back-references to I01.0

• Type 1 Excludes: I00 Rheumatic fever without heart involvement ("rheumatic fever with heart involvement (I01.0 -I01.9)")
• Type 1 Excludes: I30 Acute pericarditis ("rheumatic pericarditis (acute) (I01.0)")

Back-references to I01

• Type 2 Excludes: I51 Complications and ill-defined descriptions of heart disease ("heart disease specified as rheumatic (I00-I09)")

Diagnosis Index entries for I01.0

• Pericarditis (with decompensation) (with effusion) › acute (hemorrhagic) (nonrheumatic) (Sicca) › rheumatic
• Pericarditis (with decompensation) (with effusion) › rheumatic (active) (acute) (with effusion) (with pneumonia)
• Rheumatic (acute) (subacute) › pericarditis (active) (acute) (with effusion) (with pneumonia)

Nearby codes

• I01 Rheumatic fever with heart involvement
• I01.0 Acute rheumatic pericarditis (this code)
• I01.1 Acute rheumatic endocarditis
• I01.2 Acute rheumatic myocarditis
• I01.8 Other acute rheumatic heart disease
• I01.9 Acute rheumatic heart disease, unspecified