I31: Other diseases of pericardium
Codes under I31 (Other diseases of pericardium). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| I31.0 | Chronic adhesive pericarditis | ✓ |
| I31.0 | Chronic adhesive pericarditis | ✓ |
| I31.1 | Chronic constrictive pericarditis | ✓ |
| I31.1 | Chronic constrictive pericarditis | ✓ |
| I31.2 | Hemopericardium, not elsewhere classified | ✓ |
| I31.2 | Hemopericardium, not elsewhere classified | ✓ |
| I31.3 | Pericardial effusion (noninflammatory) | — |
| I31.3 | Pericardial effusion (noninflammatory) | — |
| I31.4 | Cardiac tamponade | ✓ |
| I31.4 | Cardiac tamponade | ✓ |
| I31.8 | Other specified diseases of pericardium | ✓ |
| I31.8 | Other specified diseases of pericardium | ✓ |
| I31.9 | Disease of pericardium, unspecified | ✓ |
| I31.9 | Disease of pericardium, unspecified | ✓ |
| I31.31 | Malignant pericardial effusion in diseases classified elsewhere | ✓ |
| I31.31 | Malignant pericardial effusion in diseases classified elsewhere | ✓ |
| I31.39 | Other pericardial effusion (noninflammatory) | ✓ |
| I31.39 | Other pericardial effusion (noninflammatory) | ✓ |
Frequently asked questions
What is ICD-10-CM code I31?
I31 is an ICD-10-CM category covering Other diseases of pericardium. It contains 18 more specific diagnosis codes, 16 of which are billable.
Is I31 a billable code?
No — I31 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example I31.0 — Chronic adhesive pericarditis). 16 of the 18 codes under I31 are billable.
What codes fall under I31?
I31 includes I31.0, I31.0, I31.1, I31.1, I31.2, plus 13 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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