ICD-10 I34.1
Billable / SpecificNonrheumatic mitral (valve) prolapse
About ICD-10-CM I34.1
ICD-10-CM code I34.1 represents Nonrheumatic mitral (valve) prolapse. This is a billable/specific code in the Circulatory System chapter (block I34). The 2026 edition of ICD-10-CM I34.1 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under I34.1. Per CMS ICD-10-CM Tabular 2026.
- Floppy nonrheumatic mitral valve syndrome
Type 1 Excludes
Pure excludes, these codes can never be coded together with I34.1. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- Marfan's syndrome (Q87.4-)
Medicare LCD Coverage for I34.1
Local Coverage Determinations (LCDs) from CMS MACs that list I34.1 as a covered diagnosis.
Showing top 10 of 430 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I34.1.
5 Medicare
CPT Codes Commonly Billed with I34.1
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 I34.1 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 |
|---|---|---|
| I34.1 | 4240 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I34.1
Other codes in section I30-I5A (Other forms of heart disease).
ICD-10 I34.1, Billing FAQ
Is ICD-10 code I34.1 billable? +
Yes, I34.1 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 I34.1? +
ICD-10 I34.1 includes: Floppy nonrheumatic mitral valve syndrome.
What codes are Type 1 Excludes for I34.1? +
Type 1 Excludes (never code together with I34.1): Marfan's syndrome (Q87.4-)
What ICD-9 codes does I34.1 map to? +
Per CMS GEMs, I34.1 maps to ICD-9 codes: 4240. 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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