I31.0 Chronic adhesive pericarditis

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

Applicable to

• Accretio cordis
• Adherent pericardium
• Adhesive mediastinopericarditis

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)

• 423.1 Adhesive pericarditis

Code annotations containing back-references to I31.0

Back-references to I31

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

Diagnosis Index entries for I31.0

• Accretio cordis (nonrheumatic)
• Adherent › pericardium (nonrheumatic)
• Adhesions, adhesive (postinfective) › cardiac
• Adhesions, adhesive (postinfective) › heart
• Adhesions, adhesive (postinfective) › pericardium (nonrheumatic)
• Cardiosymphysis
• Fibrosis, fibrotic › pericardium
• Mediastinopericarditis › adhesive
• Milk › spots
• Pericarditis (with decompensation) (with effusion) › adhesive or adherent (chronic) (external) (internal)
• Pericarditis (with decompensation) (with effusion) › fibrous
• Pericarditis (with decompensation) (with effusion) › obliterans, obliterating
• Pericarditis (with decompensation) (with effusion) › plastic
• Soldier's › patches

Nearby codes

• I31 Other diseases of pericardium
• I31.0 Chronic adhesive pericarditis (this code)
• I31.1 Chronic constrictive pericarditis
• 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)