CPT® Code 76512

Ophthalmic ultrasound, specifically the B-scan diagnostic procedure, utilizes high-frequency sound waves to generate detailed images of the eye's internal structures. This imaging technique is particularly valuable for assessing acute vision-threatening conditions or identifying abnormal pathologies that may be discovered during routine eye examinations. The unique fluid-filled composition of the eye enhances the effectiveness of ultrasound, allowing for high-resolution imaging. Ophthalmic ultrasound can serve as the primary diagnostic method for detecting anomalies within the eye or act as a complementary tool alongside other imaging modalities such as MRI and CT scans. The A-scan component of this procedure employs time amplitude ultrasound to create vertical lines along a baseline, utilizing thin, parallel sound beams directed at specific tissue areas. This A-scan image is instrumental in differentiating between various intraocular tumors, assessing extraocular muscles, and evaluating the optic nerve, as well as measuring the thickness of the lacrimal gland and examining the paranasal sinus and nasolacrimal systems. In contrast, the B-scan employs a brightness amplitude ultrasound technique, where an oscillating sound beam produces echoes that appear as pixelated images on a computer screen. This method is effective for analyzing the shape and anatomical relationships of intraocular structures, detecting foreign bodies, identifying unusual calcium deposits, and diagnosing anterior orbital tumors, tendon thickening due to myositis, and enlargement of the superior ophthalmic vein. The B-scan can be used in conjunction with the A-scan, allowing for superimposition of the two techniques to enhance the diagnostic process for ocular tumors, tissue detachment, cataracts, and traumatic injuries. The specific CPT® code 76512 is designated for the B-scan procedure, which may be performed with or without the inclusion of a non-quantitative A-scan.