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Official Description

Glutamyltransferase, gamma (GGT)

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 82977 refers to the measurement of gamma glutamyltransferase (GGT) levels through a blood test. GGT is an important enzyme that plays a crucial role in the transfer of amino acids across cell membranes, particularly in various organs such as the liver, kidneys, pancreas, heart, brain, and seminal vesicles. The assessment of GGT levels is significant as it serves as a diagnostic marker for a range of diseases affecting the liver, bile ducts, and pancreas. To perform this test, a blood sample is collected, which is typically done through a procedure known as venipuncture. This blood sample is then analyzed using quantitative enzymatic methodology, which allows for precise measurement of GGT levels in either serum or plasma. The results of this test can provide valuable insights into the health of the liver and other related organs, aiding healthcare professionals in diagnosing and managing various medical conditions.

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