ICD-10-CM · Chapter 18 · R00-R99
R00 Abnormalities of heart beat
Excludes 1 (cannot be coded together)
- abnormalities originating in the perinatal period (P29.1-)
Excludes 2 (not included here)
- specified arrhythmias (I47-I49)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| R00..0 | Tachycardia, unspecified | Yes |
| R00..1 | Bradycardia, unspecified | Yes |
| R00..2 | Palpitations | Yes |
| R00..8 | Other abnormalities of heart beat | Yes |
| R00..9 | Unspecified abnormalities of heart beat | Yes |
Plain-language terms for this code
The following entries in the US Medical Glossary correspond to ICD-10-CM category R00:
- Heart Palpitations — Palpitaciones cardíacas
- Rapid Heartbeat — Latido cardíaco rápido
- Irregular Heartbeat — Latido cardíaco irregular
- Slow Heartbeat — Latido cardíaco lento
Last reviewed: September 2026