ICD-10 I49
Non-Billable HeaderOther cardiac arrhythmias
About ICD-10-CM I49
ICD-10-CM code I49 represents Other cardiac arrhythmias. This is a non-billable header code in the Circulatory System chapter (block I49). The 2026 edition of ICD-10-CM I49 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 2 Excludes
Not included here, the excluded code is not part of I49, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- bradycardia NOS (R00.1)
- neonatal dysrhythmia (P29.1-)
- sinoatrial bradycardia (R00.1)
- sinus bradycardia (R00.1)
- vagal bradycardia (R00.1)
Coding Notes
Code First
- cardiac arrhythmia complicating:
- abortion or ectopic or molar pregnancy (O00-O07, O08.8)
- obstetric surgery and procedures (O75.4)
Medicare LCD Coverage for I49
Local Coverage Determinations (LCDs) from CMS MACs that list I49 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing I49.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but I49 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with I49
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
Codes Adjacent To I49
Other codes in section I30-I5A (Other forms of heart disease).
ICD-10 I49, Billing FAQ
Is ICD-10 code I49 billable? +
No, I49 is a non-billable header code. Use a more specific child code from block I49 when submitting claims.
What codes are Type 2 Excludes for I49? +
Type 2 Excludes (may be coded together when both conditions exist): bradycardia NOS (R00.1); neonatal dysrhythmia (P29.1-); sinoatrial bradycardia (R00.1)
What CPT codes are commonly billed with I49? +
Procedures frequently paired with I49 include: 93010, 93613, 93616.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 2, 2026.
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