ICD-10 I45.4
Billable / SpecificNonspecific intraventricular block
About ICD-10-CM I45.4
ICD-10-CM code I45.4 represents Nonspecific intraventricular block. This is a billable/specific code in the Circulatory System chapter (block I45). The 2026 edition of ICD-10-CM I45.4 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under I45.4. Per CMS ICD-10-CM Tabular 2026.
- Bundle-branch block NOS
Medicare LCD Coverage for I45.4
Local Coverage Determinations (LCDs) from CMS MACs that list I45.4 as a covered diagnosis.
Showing top 10 of 204 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I45.4.
1 Cigna
5 Medicare
1 Aetna
CPT Codes Commonly Billed with I45.4
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 I45.4 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 |
|---|---|---|
| I45.4 | 42650 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I45.4
Other codes in section I30-I5A (Other forms of heart disease).
ICD-10 I45.4, Billing FAQ
Is ICD-10 code I45.4 billable? +
Yes, I45.4 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 I45.4? +
ICD-10 I45.4 includes: Bundle-branch block NOS.
What ICD-9 codes does I45.4 map to? +
Per CMS GEMs, I45.4 maps to ICD-9 codes: 42650. 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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