R00 Abnormalities of heart beat

The ICD-10-CM code for Abnormalities of heart beat is R00 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

Section

R00-R09: Symptoms and signs involving the circulatory and respiratory systems (R00-R09)

Category R00

6 codes (5 billable)

FY2026 Status

Stable since FY2024

Official Coding Guidelines

Chapter 18 scope; symptoms pointing to specific dx classified elsewhere

18. Chapter 18: Symptoms, signs, and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) Chapter 18 includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded. Signs and symptoms that point to a specific diagnosis have been assigned to a category in other chapters of the classification.

Codes that describe symptoms and signs

D. Codes that describe symptoms and signs Codes that describe symptoms and signs, as opposed to diagnoses, are acceptable for reporting purposes when a diagnosis has not been established (confirmed) by the provider. Chapter 18 of ICD-10-CM, Symptoms, Signs, and Abnormal Clinical and Laboratory Findings Not Elsewhere Classified (codes R00-R99) contain many, but not all codes for symptoms.

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool