2026 ICD-10-CM Diagnosis Code R00Abnormalities of heart beat
R00 is a non-billable ICD-10-CM category code for abnormalities of heart beat, so it cannot be submitted on claims. Use a more specific code from this category instead, such as R00.0, R00.1, R00.2, and R00.8. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established.
This medical diagnosis code is frequently used in Cardiology medical specialties to designate conditions such abnormalities of heart rhythm.
Code Identity
Code Classification
Specific Coding for Abnormalities of heart beatOverview
Non-specific codes like R00 require more characters. Use one of these billable codes instead:
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- abnormalities originating in the perinatal period P29.1
Type 2 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Patient EducationClinical
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.
The full article covers:
- What is an arrhythmia?
- What causes an arrhythmia?
- What are the symptoms of an arrhythmia?
- How is an arrhythmia diagnosed?
- What are the treatments for an arrhythmia?
- Can arrhythmias be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
Questions About R00Overview
Is R00 (Abnormalities of heart beat) a billable code?
No. This is a category header that groups the codes for abnormalities of heart beat, and headers cannot be submitted on claims. Claims for abnormalities of heart beat need a more specific code from this category, such as R00.0, R00.1, and R00.2.
Can R00 be a principal diagnosis?
Use it with care. This is a symptom code, so once a definitive diagnosis explaining the abnormalities of heart beat is established, that condition takes the principal position instead.
