CPT® Code 82378

The CPT® Code 82378 refers to the laboratory test for measuring carcinoembryonic antigen (CEA) levels in blood and body fluids. CEA is a glycoprotein that is typically present in high concentrations during fetal development but is usually found at low or undetectable levels in healthy adults. The presence of elevated CEA levels can be indicative of various malignancies, including colorectal, breast, lung, pancreatic, prostate, ovarian, and medullary thyroid cancers. This test is particularly useful in assessing tumor characteristics such as size, stage, and the potential for metastasis. Following a cancer diagnosis, a baseline CEA level is often established, and subsequent serial testing is conducted to monitor the effectiveness of treatment and the patient's response to therapy. In addition to its role in oncology, elevated CEA levels may also be observed in individuals who smoke or those with certain inflammatory conditions, liver diseases such as cirrhosis, gastrointestinal disorders like peptic ulcer and ulcerative colitis, as well as benign conditions such as rectal polyps, emphysema, and benign breast disease. It is important to note that CEA testing is not recommended for routine screening in the general population due to its lack of specificity. The test requires a blood sample, which is obtained through a separately reportable venipuncture. In cases where cerebrospinal fluid (CSF) is needed, it is collected via a separately reportable lumbar puncture, while pleural and peritoneal fluids are acquired through needle aspiration. The analysis of serum, plasma, and body fluids is performed using a quantitative electrochemiluminescent immunoassay, ensuring accurate measurement of CEA levels.