I49.89 – Other specified cardiac arrhythmias not elsewhere classified

ICD-10-CM 2027 diagnosis code · Other forms of heart disease

Billable code New in 2027

ICD-10-CM code I49.89

Code: I49.89 (claims format: I4989)
Description: Other specified cardiac arrhythmias not elsewhere classified
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I30-I5A Other forms of heart disease
Parent codes: I49 › I49.8

Notes for I49.89

Applicable to:

Coronary sinus rhythm disorder
Ectopic rhythm disorder
Nodal rhythm disorder

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

I49 – Other cardiac arrhythmias

Excludes2 (not included here):

bradycardia NOS (R00.1)
neonatal dysrhythmia (P29.1-)
sinoatrial bradycardia (R00.1)
sinus bradycardia (R00.1)
vagal bradycardia (R00.1)

Code first:

cardiac arrhythmia complicating:
abortion or ectopic or molar pregnancy (O00-O07, O08.8)
obstetric surgery and procedures (O75.4)

Index terms for I49.89

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in I49.8

I49.81 – Brugada syndromeBillable
I49.82 – Ventricular bigeminyBillable

Frequently asked questions

What is ICD-10 code I49.89?

I49.89 is the ICD-10-CM code for other specified cardiac arrhythmias not elsewhere classified, in the block I30-I5A (Other forms of heart disease).

Is I49.89 a billable code?

Yes. I49.89 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I49.89 belong to?

It belongs to category I49 – Other cardiac arrhythmias.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.