CPT® Code 0279T

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Cell enumeration using immunologic selection and identification in fluid specimens, as described by CPT® Code 0279T, refers to a specialized laboratory procedure aimed at identifying circulating tumor cells (CTCs) present in blood samples. This innovative method is particularly significant for monitoring disease progression in patients diagnosed with various types of cancer, including breast, colorectal, and prostate cancers. The process involves several intricate steps that utilize advanced testing equipment to ensure accurate identification of these cells. Initially, a blood sample is collected using a designated collection kit, which is crucial for maintaining the integrity of the specimen. Following collection, the sample undergoes centrifugation to separate the plasma from the cellular components. The remaining cells are then treated with a buffer solution and a reagent that is conjugated with a monoclonal antibody specifically designed to bind to epithelial cells. This selective binding is essential for isolating the target cells from other cellular debris. Once the epithelial cells are bound, a magnet is employed to separate them from unbound cells and other contaminants. The next step involves staining the bound cells with three distinct stains that help differentiate viable epithelial cells from any leukocytes or other debris that may be present. After staining, a magnet is again used to attract the labeled epithelial cells to the surface of a testing cartridge, where they can be visualized. A fluorescence-based microscopy system captures images of these cells, allowing a trained technologist to review and identify tumor cells based on their specific phenotype and the staining characteristics. This comprehensive approach to cell enumeration is critical for providing insights into the patient's cancer status and guiding treatment decisions. It is important to note that while CPT® Code 0279T covers the technical laboratory component of this procedure, the professional component, which includes physician review, interpretation, and a written report of findings, is designated under CPT® Code 0280T.