R00: Abnormalities of heart beat
Codes under R00 (Abnormalities of heart beat). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| R00.0 | Tachycardia, unspecified | ✓ |
| R00.0 | Tachycardia, unspecified | ✓ |
| R00.1 | Bradycardia, unspecified | ✓ |
| R00.1 | Bradycardia, unspecified | ✓ |
| R00.2 | Palpitations | ✓ |
| R00.2 | Palpitations | ✓ |
| R00.8 | Other abnormalities of heart beat | ✓ |
| R00.8 | Other abnormalities of heart beat | ✓ |
| R00.9 | Unspecified abnormalities of heart beat | ✓ |
| R00.9 | Unspecified abnormalities of heart beat | ✓ |
Frequently asked questions
What is ICD-10-CM code R00?
R00 is an ICD-10-CM category covering Abnormalities of heart beat. It contains 10 more specific diagnosis codes, 10 of which are billable.
Is R00 a billable code?
No — R00 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example R00.0 — Tachycardia, unspecified). 10 of the 10 codes under R00 are billable.
What codes fall under R00?
R00 includes R00.0, R00.0, R00.1, R00.1, R00.2, plus 5 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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