R00
Non-billableAbnormalities of heart beat
R00 is the ICD-10-CM code for Abnormalities of heart beat. It is a non-billable category code — use a more specific child code such as R00.0 for billing.
- Status
- Header (non-billable)
- Chapter
- R00-R99
- Subcodes
- 5
- Edition
- FY2026
R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
What this means — in plain language
MedlinePlus · NIHWhat 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.
Excludes1 — not coded here
- •abnormalities originating in the perinatal period (P29.1-)
Frequently asked questions
- What is ICD-10 code R00?
- R00 is the ICD-10-CM code for "Abnormalities of heart beat". It falls under R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
- Is R00 a billable code?
- No — R00 is a non-billable header code. Use a more specific child code (such as R00.0) for billing.
- What is excluded from R00?
- Excludes1 (not coded here): abnormalities originating in the perinatal period (P29.1-).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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