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I49

Non-billable

Other cardiac arrhythmias

I49 is the ICD-10-CM code for Other cardiac arrhythmias. It is a non-billable category code — use a more specific child code such as I49.0 for billing.

Status
Header (non-billable)
Chapter
I00-I99
Subcodes
8
Edition
FY2026

I00-I99 Diseases of the circulatory system

What this means — in plain language

MedlinePlus · NIH

What is an arrhythmia? An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias. When your heart beats faster than normal, it's called tachycardia . When your heart beats too slowly, it's called bradycardia . When the signal to beat comes too early, it's…

Read more about Arrhythmia at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

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)

Medications indicated for this condition

FDA labeling

Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.

Conditions mapped to this code

MedlinePlus · NIH
Arrhythmia

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

Frequently asked questions

What is ICD-10 code I49?
I49 is the ICD-10-CM code for "Other cardiac arrhythmias". It falls under I00-I99 Diseases of the circulatory system.
Is I49 a billable code?
No — I49 is a non-billable header code. Use a more specific child code (such as I49.0) for billing.
What are the subcodes of I49?
I49 has 8 more specific child codes, including I49.0, I49.1, I49.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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