CPT code 76513 identifies immersion B–scan ultrasound or high-resolution biomicroscopy imaging of the anterior segment of one or both eyes. The code covers diagnostic imaging used to visualize anterior ocular structures when slit-lamp or standard imaging is insufficient. Nationally, this code matters for ophthalmology practices, imaging centers, and payers because it defines billing for specialized anterior segment imaging that can affect diagnostic pathways and downstream costs.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how the code is described clinically, typical sites of service, and the service type. The publication summarizes payer coverage patterns and common modifier usage where available, outlines typical clinical indications for immersion B–scan and high-resolution biomicroscopy, and highlights billing considerations relevant to outpatient ophthalmic imaging. Data not available in the input is noted where applicable.

This content is intended to provide a concise national-level reference for coding, clinical context, and payer considerations related to CPT code 76513.