I49
ICD-10Non-billable categoryOther cardiac arrhythmias
Official ICD-10-CM descriptor (FY2026)
Other cardiac arrhythmias
I49 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- bradycardia NOS (R00.1)
- neonatal dysrhythmia (P29.1-)
- sinoatrial bradycardia (R00.1)
- sinus bradycardia (R00.1)
- vagal bradycardia (R00.1)
Code first
Sequence the underlying condition before this code.
- cardiac arrhythmia complicating:
- abortion or ectopic or molar pregnancy (O00-O07, O08.8)
- obstetric surgery and procedures (O75.4)
More specific codes under I49
- I49.0Ventricular fibrillation and fluttercategory
- I49.1Atrial premature depolarization
- I49.2Junctional premature depolarization
- I49.3Ventricular premature depolarization
- I49.4Other and unspecified premature depolarizationcategory
- I49.5Sick sinus syndrome
- I49.8Other specified cardiac arrhythmias
- I49.9Cardiac arrhythmia, unspecified
Where this code sits
Krasyn AI Coder
Get code suggestions automatically as you type notes. Free for 50 analyses.
Install for Chrome — freeSource
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.