I49 vs R00.1
I49 (Other cardiac arrhythmias) compared with R00.1 (Bradycardia, unspecified), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. I49 carries an Excludes2 note covering R00.1: “bradycardia NOS (R00.1)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. I49 carries an Excludes2 note covering R00.1: “sinoatrial bradycardia (R00.1)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. I49 carries an Excludes2 note covering R00.1: “sinus bradycardia (R00.1)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. I49 carries an Excludes2 note covering R00.1: “vagal bradycardia (R00.1)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. R00.1 carries an Excludes2 note covering I49: “specified arrhythmias (I47-I49)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| I49Other cardiac arrhythmias | R00.1Bradycardia, unspecified | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | I00-I99 — Diseases of the Circulatory System (I00-I99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Other cardiac arrhythmias is a non-billable ICD-10-CM category code (I49). | Bradycardia, unspecified is a billable ICD-10-CM diagnosis code (R00.1). |
| Includes | — | Sinoatrial bradycardia Sinus bradycardia Slow heart beat Vagal bradycardia |
| Use additional code | — | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) |
| Code first | cardiac arrhythmia complicating: abortion or ectopic or molar pregnancy (O00-O07, O08.8) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources