I49 ICD-10-CA category: Other cardiac arrhythmias

I49 isn’t a code on its own. Choose one of the 9 codes beneath it, the one the documentation supports.

Official description

I49

Other cardiac arrhythmias

ICD-10-CA · Canada

Codes in I49

I49 isn’t a code on its own. Open the group that matches what the note documents.

I49.0Ventricular fibrillation and flutter (2 codes)I49.1Atrial premature depolarization I49.2Junctional premature depolarization I49.3Ventricular premature depolarization I49.4Other and unspecified premature depolarization I49.5Sick sinus syndrome I49.8Other specified cardiac arrhythmias I49.9Cardiac arrhythmia, unspecified

Notes for I49

As CIHI prints them, with any note I49 takes from the headings above it.

Excludes

Conditions classified elsewhere.

Bradycardia:• NOS (R00.1)• sinoatrial NOS (R00.1)• sinus (R00.1)• vagal (R00.1)complicating:• abortion or ectopic or molar pregnancy (O00-O07) (O08.8)• obstetric surgery and procedures (O75.4)neonatal cardiac dysrhythmia (P29.18)
Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)systemic connective tissue disorders (M30-M36)transient cerebral ischaemic attacks and related syndromes (G45.-)From Chapter 9: Diseases of the circulatory system (I00-I99)

Where I49 sits

1ChapterChapter 9: Diseases of the circulatory system (I00-I99)
2Block I30-I52Other forms of heart disease
3Category I49Other cardiac arrhythmias

Source and release

Data release: ICD-10-CA · FY 2026–2027
Effective date: Apr 1, 2026
Publisher: CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See I49 in the CIHI source

Frequently asked questions

Is I49 a valid ICD-10-CA code?

No. I49 (Other cardiac arrhythmias) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 9 codes; record the one the documentation supports.

Where is I49 in ICD-10-CA?

I49 sits under I30-I52 Other forms of heart disease, within Chapter 9: Diseases of the circulatory system (I00-I99).

What coding notes apply to I49?

ICD-10-CA lists Excludes notes for I49, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.