Other diseases of pericardium (I31) ICD-10-CM
The I31 code range covers other diseases of pericardium with 10 ICD-10-CM diagnosis codes. 8 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the I31 Range 10 codes · 8 billable
- I31 Other diseases of pericardiumNon-billable
- I31.0 Chronic adhesive pericarditis
- I31.1 Chronic constrictive pericarditis
- I31.2 Hemopericardium, not elsewhere classified
- I31.3 Pericardial effusion (noninflammatory)Non-billable
- I31.31 Malignant pericardial effusion in diseases classified elsewhere
- I31.39 Other pericardial effusion (noninflammatory)
- I31.4 Cardiac tamponade
- I31.8 Other specified diseases of pericardium
- I31.9 Disease of pericardium, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I31 range.
Cardiac Tamponade
Compression of the heart by accumulated fluid (PERICARDIAL EFFUSION) or blood (HEMOPERICARDIUM) in the PERICARDIUM surrounding the heart. The affected cardiac functions and CARDIAC OUTPUT can range from minimal to total hemodynamic collapse.
Hemopericardium
An accumulation of blood within the pericardial sac.
Pericardial Effusion
Fluid accumulation within the PERICARDIUM. Serous effusions are associated with pericardial diseases. Hemopericardium is associated with trauma. Lipid-containing effusion (chylopericardium) results from leakage of THORACIC DUCT. Severe cases can lead to CARDIAC TAMPONADE.
Pericarditis
Inflammation of the PERICARDIUM from various origins, such as infection, neoplasm, autoimmune process, injuries, or drug-induced. Pericarditis usually leads to PERICARDIAL EFFUSION, or CONSTRICTIVE PERICARDITIS.
About the I31 Code Range
These conditions affect the pericardium, the covering around the heart. The category separates chronic pericarditis, blood or fluid around the heart, cardiac tamponade, and other pericardial diseases.
I31.0 identifies chronic adhesive pericarditis, while I31.1 identifies chronic constrictive pericarditis. I31.2 names hemopericardium. Noninflammatory pericardial effusion falls under I31.3, with subdivisions for malignant effusion in diseases classified elsewhere and other noninflammatory effusion. The remaining subdivisions identify cardiac tamponade, other specified pericardial diseases, and unspecified pericardial disease.
Questions About This Page
How many billable codes are in the I31 range?
Of the 10 codes in this range, 8 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the I31 range classify?
The range classifies other diseases of pericardium. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
