ICD-10 I45.89
Billable / Specific CCOther specified conduction disorders
About ICD-10-CM I45.89
ICD-10-CM code I45.89 represents Other specified conduction disorders. This is a billable/specific code in the Circulatory System chapter (block I45). The 2026 edition of ICD-10-CM I45.89 became effective on October 1, 2025.
Coding Tips for I45.89
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
I45.89 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.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under I45.89. Per CMS ICD-10-CM Tabular 2026.
- Atrioventricular [AV] dissociation
- Interference dissociation
- Isorhythmic dissociation
- Nonparoxysmal AV nodal tachycardia
Inpatient DRG Impact, CC
codes Other specified conduction disorders. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for I45.89
Local Coverage Determinations (LCDs) from CMS MACs that list I45.89 as a covered diagnosis.
Showing top 10 of 414 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I45.89.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with I45.89
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- G0448 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
- 33216 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
- 33230 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
- 33244 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
- 33264 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
- 33263 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
- 33220 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
- 33224 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
- 33270 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
- 33272 CMS LCD: Billing and Coding: Implantable Automatic Defibrillators CMS LCD
Convert I45.89 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 |
|---|---|---|
| I45.89 | 42689 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To I45.89
Other codes in section I30-I5A (Other forms of heart disease).
ICD-10 I45.89, Billing FAQ
Is ICD-10 code I45.89 billable? +
Yes, I45.89 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 I45.89? +
ICD-10 I45.89 includes: Atrioventricular [AV] dissociation; Interference dissociation; Isorhythmic dissociation, and 1 more clinical synonyms.
Is I45.89 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 I45.89? +
Procedures frequently paired with I45.89 include: G0448, 33216, 33230, 33244, 33264.
What ICD-9 codes does I45.89 map to? +
Per CMS GEMs, I45.89 maps to ICD-9 codes: 42689. 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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