ICD-10 I45.2
Billable / Specific CCBifascicular block
About ICD-10-CM I45.2
ICD-10-CM code I45.2 represents Bifascicular block. This is a billable/specific code in the Circulatory System chapter (block I45). The 2026 edition of ICD-10-CM I45.2 became effective on October 1, 2025.
Coding Tips for I45.2
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I45.2 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Inpatient DRG Impact, CC
codes Bifascicular block. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for I45.2
Local Coverage Determinations (LCDs) from CMS MACs that list I45.2 as a covered diagnosis.
Showing top 10 of 389 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I45.2.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with I45.2
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 33208 CMS LCD: Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemakers � Coding and Billing CMS LCD
- 33206 CMS LCD: Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemakers � Coding and Billing CMS LCD
- 33207 CMS LCD: Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemakers � Coding and Billing CMS LCD
- 93281 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93280 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93296 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93279 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93283 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93261 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
- 93288 CMS LCD: Billing and Coding: Cardiac Rhythm Device Evaluation CMS LCD
Convert I45.2 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 |
|---|---|---|
| I45.2 | 42651 | 10000 |
| I45.2 | 42652 | 10000 |
| I45.2 | 42653 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I45.2
Other codes in section I30-I5A (Other forms of heart disease).
ICD-10 I45.2, Billing FAQ
Is ICD-10 code I45.2 billable? +
Yes, I45.2 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Is I45.2 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What CPT codes are commonly billed with I45.2? +
Procedures frequently paired with I45.2 include: 33208, 33206, 33207, 93281, 93280.
What ICD-9 codes does I45.2 map to? +
Per CMS GEMs, I45.2 maps to ICD-9 codes: 42651, 42652, 42653. 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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