ICD-10 I31
Non-Billable HeaderOther diseases of pericardium
About ICD-10-CM I31
ICD-10-CM code I31 represents Other diseases of pericardium. This is a non-billable header code in the Circulatory System chapter (block I31). The 2026 edition of ICD-10-CM I31 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 1 Excludes
Pure excludes, these codes can never be coded together with I31. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- diseases of pericardium specified as rheumatic (I09.2)
- postcardiotomy syndrome (I97.0)
- traumatic injury to pericardium (S26.-)
Medicare LCD Coverage for I31
Local Coverage Determinations (LCDs) from CMS MACs that list I31 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I31.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but I31 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with I31
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To I31
Other codes in section I30-I5A (Other forms of heart disease).
ICD-10 I31, Billing FAQ
Is ICD-10 code I31 billable? +
No, I31 is a non-billable header code. Use a more specific child code from block I31 when submitting claims.
What codes are Type 1 Excludes for I31? +
Type 1 Excludes (never code together with I31): diseases of pericardium specified as rheumatic (I09.2); postcardiotomy syndrome (I97.0); traumatic injury to pericardium (S26.-)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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