CPT® Code 65400

The procedure described by CPT® Code 65400 refers to the excision of a lesion from the cornea, specifically a lamellar keratectomy that is partial in nature and excludes pterygium. Corneal lesions that necessitate excision can arise from various conditions, including dystrophic changes, degenerative processes, hypertrophic growths, or scar tissue formation. The procedure is typically performed under magnification using a slit lamp or an operating microscope, which allows for precise visualization of the lesion. During the excision, the surface epithelial cells of the cornea are carefully removed using instruments such as blunt forceps, spatulas, or sponges. This step is crucial as it helps to clearly define the margins of the lesion and exposes the underlying corneal epithelium along with any subepithelial fibrous or fibrovascular tissue that may be present. Following the delineation of the lesion, the deeper portions are excised through either blunt or sharp dissection techniques. To enhance the healing process, the surface of the cornea may be polished with a diamond burr, and a bandage contact lens is placed at the end of the procedure. This lens serves to protect the cornea and promote the regeneration of epithelial cells from the limbic stem cells, facilitating optimal recovery.