ICD-10 I51.89
Billable / SpecificOther ill-defined heart diseases
About ICD-10-CM I51.89
ICD-10-CM code I51.89 represents Other ill-defined heart diseases. This is a billable/specific code in the Circulatory System chapter (block I51). The 2026 edition of ICD-10-CM I51.89 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under I51.89. Per CMS ICD-10-CM Tabular 2026.
- Carditis (acute)(chronic)
- Pancarditis (acute)(chronic)
Medicare LCD Coverage for I51.89
Local Coverage Determinations (LCDs) from CMS MACs that list I51.89 as a covered diagnosis.
Showing top 10 of 346 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I51.89.
1 Aetna
1 Cigna
5 Medicare
CPT Codes Commonly Billed with I51.89
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.
Convert I51.89 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| I51.89 | 42981 | 10000 |
| I51.89 | 42982 | 10000 |
| I51.89 | 42989 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I51.89
Other codes in section I30-I5A (Other forms of heart disease).
ICD-10 I51.89, Billing FAQ
Is ICD-10 code I51.89 billable? +
Yes, I51.89 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to I51.89? +
ICD-10 I51.89 includes: Carditis (acute)(chronic); Pancarditis (acute)(chronic).
What ICD-9 codes does I51.89 map to? +
Per CMS GEMs, I51.89 maps to ICD-9 codes: 42981, 42982, 42989. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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