Abnormal electrocardiogram [ECG] [EKG]

This code indicates an electrocardiogram (ECG/EKG) tracing that deviates from normal parameters, suggesting an underlying cardiac abnormality. It is a non-specific finding that requires further investigation to determine the precise etiology of the electrical disturbance.

Use this code when the physician's interpretation of an ECG/EKG explicitly states "abnormal ECG," "non-specific ST-T wave changes," "arrhythmia not otherwise specified," or similar findings without a more definitive diagnosis. This code is appropriate when the ECG report indicates an abnormality but the specific cardiac condition causing it has not yet been determined or documented.

• Do not code this if a more specific diagnosis for the ECG abnormality (e.g., atrial fibrillation, myocardial infarction) is documented.
• Remember the Excludes1 note: never code this with long QT syndrome (I45.81).
• This code is often used as a primary diagnosis when the abnormal ECG is the reason for the encounter, or as a secondary diagnosis when it's an incidental finding requiring follow-up.