Abnormal EKG ICD-10-CM codes
ICD-10-CM codes for an abnormal electrocardiogram (ECG or EKG) and other abnormal cardiovascular function studies.
6 codes, 5 billable. FY2027, valid from October 1, 2026. In chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings.
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How to code Abnormal EKG
R94.31 is abnormal electrocardiogram [ECG] [EKG], which covers nonspecific ST-T changes and prolonged QT interval when no diagnosis is given. Abnormal stress tests and other cardiovascular studies are R94.39.
When a diagnosis is made, it replaces R94.31, for example congenital long QT syndrome I45.81 or a specific arrhythmia. A preoperative cardiovascular exam with an EKG is Z01.810, with R94.31 added if the tracing is abnormal.
All Abnormal EKG codes
- I45.81Long QT syndrome
- R94.3Abnormal results of cardiovascular function studies
- R94.30Abnormal result of cardiovascular function study, unspecified
- R94.31Abnormal electrocardiogram [ECG] [EKG]
- R94.39Abnormal result of other cardiovascular function study
- Z01.810Encounter for preprocedural cardiovascular examination
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