Other fascicular block

This code signifies a conduction abnormality within the heart's electrical system, specifically affecting the fascicles (branches) of the bundle of His, excluding complete left or right bundle branch blocks. It indicates a delay or interruption in the electrical impulse transmission through these specialized pathways, which can impact ventricular depolarization.

Assign this code when documentation specifies a fascicular block that doesn't fit the criteria for a left anterior, left posterior, or unspecified fascicular block. This diagnosis is typically made based on electrocardiogram (ECG) findings interpreted by a cardiologist. Supporting documentation should clearly identify the specific fascicular block as "other" or not otherwise specified.

• Do not use this code for complete left bundle branch block (LBBB) or right bundle branch block (RBBB), which have their own specific codes.
• Ensure the physician's documentation explicitly states "other fascicular block" or describes a fascicular block not covered by more specific codes.
• Always sequence this code after any underlying cardiac conditions that may be causing the fascicular block.