CPT® Code 88173

The CPT® Code 88173 refers to the process of cytopathology, specifically the evaluation of a fine needle aspirate (FNA) through interpretation and reporting. This procedure involves the collection of fluid or tissue samples using a fine needle, which is then placed on a slide for examination. During this process, the cells are organized into clusters, typically consisting of around 10 cells each. A smear is created by placing another slide on top of the first, allowing for the cells to be spread out for better visualization. Stains may be applied to enhance the cellular details, making it easier to identify any abnormalities. The primary goal of this evaluation is to detect signs of disease, particularly malignancy. In conjunction with this code, CPT® Code 88172 is relevant as it pertains to an immediate cytohistologic study that assesses the adequacy of the specimen collected. The physician examines the sample microscopically to ensure that there are enough cells for a reliable evaluation and diagnosis. The accuracy of the diagnosis improves significantly when there are at least six cell clusters available for review. If the sample is deemed inadequate, the aspiration procedure may need to be repeated. CPT® Code 88173 is specifically reported for the first evaluation episode for each site from which separate specimens are obtained. Once an adequate cell sample is confirmed, the physician conducts a thorough examination under a microscope to identify any signs of malignancy or other diseases. The interpretation provided by the physician will detail the characteristics of the cells, categorizing them as clearly benign, clearly malignant, or indeterminate, which indicates that a definitive diagnosis cannot be established. A comprehensive written report is generated to document the findings of this evaluation.