Nonspecific intraventricular block

This code represents a conduction abnormality within the ventricles of the heart that does not meet the specific criteria for a complete right or left bundle branch block. It indicates a delay or disruption in the electrical impulse's journey through the ventricular conduction system, leading to a widened QRS complex on an electrocardiogram (ECG) without a definitive bundle branch block pattern.

Use this code when ECG findings show a QRS duration of 0.10 seconds or greater, but the morphology does not clearly fit the diagnostic criteria for a complete right or left bundle branch block. Documentation should explicitly state "nonspecific intraventricular block," "intraventricular conduction delay (IVCD) not otherwise specified," or similar terminology. This code is appropriate when the physician has ruled out more specific conduction defects.

• Do not use this code if the documentation specifies a complete right bundle branch block (RBBB) or left bundle branch block (LBBB); use the more specific codes.
• Ensure the medical record clearly supports the "nonspecific" nature of the block, often indicated by the absence of characteristic RBBB or LBBB patterns.
• Consider sequencing this code after any underlying cardiac conditions, such as ischemic heart disease or cardiomyopathy, if they are documented as the cause.