Left posterior fascicular block
ICD-10 I44.5 is a billable code used to indicate a diagnosis of left posterior fascicular block.
Left posterior fascicular block (LPFB) is a type of intraventricular conduction delay characterized by a blockage in the left posterior fascicle of the left bundle branch. This condition can lead to a delay in the electrical impulses traveling through the heart, potentially resulting in altered cardiac function. Clinically, patients may present with symptoms such as palpitations, syncope, or may be asymptomatic. The anatomy involved includes the left bundle branch, which divides into anterior and posterior fascicles; LPFB specifically affects the posterior fascicle. Disease progression can vary, with some patients remaining stable while others may develop more significant conduction disturbances or heart failure over time. Diagnostic considerations include an electrocardiogram (ECG), which typically shows a left axis deviation and a characteristic pattern of QRS widening. It is essential to differentiate LPFB from other conduction blocks, such as left bundle branch block (LBBB) or right bundle branch block (RBBB), as the management and implications for cardiac health may differ.
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
Standard ICD-10-CM documentation requirements apply
Various clinical presentations within this specialty area
Follow specialty-specific billing guidelines
I44.5 specifically covers left posterior fascicular block, which may occur in isolation or in conjunction with other cardiac conditions such as hypertension or ischemic heart disease.
I44.5 should be used when there is clear evidence of a left posterior fascicular block on an ECG, differentiating it from other blocks like LBBB or RBBB, which have different implications for management.
Documentation should include a detailed ECG report showing the characteristic findings of LPFB, clinical symptoms, and any relevant history of heart disease or other contributing factors.
