ICD-10 I05.9
Billable / SpecificRheumatic mitral valve disease, unspecified
About ICD-10-CM I05.9
ICD-10-CM code I05.9 represents Rheumatic mitral valve disease, unspecified. This is a billable/specific code in the Circulatory System chapter (block I05). The 2026 edition of ICD-10-CM I05.9 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under I05.9. Per CMS ICD-10-CM Tabular 2026.
- Rheumatic mitral (valve) disorder (chronic) NOS
Medicare LCD Coverage for I05.9
Local Coverage Determinations (LCDs) from CMS MACs that list I05.9 as a covered diagnosis.
Showing top 10 of 248 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I05.9.
2 Aetna
2 Cigna
5 Medicare
CPT Codes Commonly Billed with I05.9
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 I05.9 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 |
|---|---|---|
| I05.9 | 3949 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I05.9
Other codes in section I05-I09 (Chronic rheumatic heart diseases).
ICD-10 I05.9, Billing FAQ
Is ICD-10 code I05.9 billable? +
Yes, I05.9 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 I05.9? +
ICD-10 I05.9 includes: Rheumatic mitral (valve) disorder (chronic) NOS.
What ICD-9 codes does I05.9 map to? +
Per CMS GEMs, I05.9 maps to ICD-9 codes: 3949. 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 June 1, 2026.
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