I31.1 Chronic constrictive pericarditis

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

Applicable to

• Concretio cordis
• Pericardial calcification

Applies from I31 Other diseases of pericardium

Excludes1 (never code together)

• diseases of pericardium specified as rheumatic (I09.2)
• postcardiotomy syndrome (I97.0)
• traumatic injury to pericardium (S26.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 423.2 Constrictive pericarditis

Code annotations containing back-references to I31.1

Back-references to I31

• Type 1 Excludes: I09.2 Chronic rheumatic pericarditis ("chronic pericarditis not specified as rheumatic (I31.-)")

Diagnosis Index entries for I31.1

• Calcification › pericardium
• Concato's disease (pericardial polyserositis) › nontubercular
• Concretio cordis
• Disease, diseased › Concato's (pericardial polyserositis) › nontubercular
• Disease, diseased › Pick's › of pericardium (pericardial pseudocirrhosis of liver)
• Gouley's syndrome (constrictive pericarditis)
• Pericarditis (with decompensation) (with effusion) › calcareous
• Pericarditis (with decompensation) (with effusion) › constrictive (chronic)
• Pick's › disease or syndrome (brain) › pericardium (pericardial pseudocirrhosis of liver)
• Pick's › syndrome › of heart (pericardial pseudocirrhosis of liver)
• Polyserositis › due to pericarditis
• Polyserositis › pericardial
• Pseudocirrhosis, liver, pericardial
• Serositis, multiple › pericardial
• Syndrome › Gouley's

Nearby codes

• I31 Other diseases of pericardium
• I31.0 Chronic adhesive pericarditis
• I31.1 Chronic constrictive pericarditis (this code)
• I31.2 Hemopericardium, not elsewhere classified
• I31.3 Pericardial effusion (noninflammatory)
• I31.31 Malignant pericardial effusion in diseases classified elsewhere
• I31.39 Other pericardial effusion (noninflammatory)
• I31.4 Cardiac tamponade