ICD-10 code for abnormality heart beat

The ICD-10-CM code for abnormality heart beat is R00.9 (Unspecified abnormalities of heart beat). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on R00.9.

Within R00, choose R00.9 (Unspecified abnormalities of heart beat) only when documentation doesn't support a more specific option: tachycardia, unspecified (R00.0), bradycardia, unspecified (R00.1), Palpitations (R00.2) and other abnormalities of heart beat (R00.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 314 (Other Circulatory System Diagnoses with MCC, relative weight 2.0873), DRG 315 (Other Circulatory System Diagnoses with CC, relative weight 0.9508) and DRG 316 (Other Circulatory System Diagnoses without CC/MCC, relative weight 0.6677), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.