U.S. ICD-10-CM · FY 2027

I49 ICD-10-CM Code: Other cardiac arrhythmias

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

I49

Other cardiac arrhythmias

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where I49 sits

  1. 1

    Chapter 9

    Diseases of the circulatory system (I00-I99)

  2. 2

    Section

    Other forms of heart disease (I30-I5A)

  3. 3

    Category I49

    Other cardiac arrhythmias

  4. 4

    Code I49

    Other cardiac arrhythmias

More specific choices

Codes under I49

I49 is a non-billable category. Choose the child code that best matches the documented diagnosis.

I49.0

Ventricular fibrillation and flutter

I49.1

Atrial premature depolarization

I49.2

Junctional premature depolarization

I49.3

Ventricular premature depolarization

I49.4

Other and unspecified premature depolarization

I49.5

Sick sinus syndrome

I49.8

Other specified cardiac arrhythmias

I49.9

Cardiac arrhythmia, unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for I49.

Code first

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

Use additional code

No “use additional code” instruction is listed for I49.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for I49.

Excludes2

Conditions not included here that may be reported separately when present.

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

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code I49 mean?

I49 is the FY 2027 U.S. ICD-10-CM code for “Other cardiac arrhythmias.”

Is I49 a billable or specific ICD-10-CM code?

No. I49 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is I49 located in ICD-10-CM?

I49 is listed in Chapter 9, Diseases of the circulatory system (I00-I99), within Other forms of heart disease (I30-I5A) (I30–I5A), under category I49, Other cardiac arrhythmias.

What coding notes are listed for I49?

No inclusion terms are listed for I49 in this reference record. Code-first instructions: cardiac arrhythmia complicating:; abortion or ectopic or molar pregnancy (O00-O07, O08.8); obstetric surgery and procedures (O75.4). No Excludes1 note is listed. Excludes2 notes: bradycardia NOS (R00.1); neonatal dysrhythmia (P29.1-); sinoatrial bradycardia (R00.1); sinus bradycardia (R00.1); vagal bradycardia (R00.1).

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