CPT® Code 83008

Deleted

The CPT® Code 83008 refers to a laboratory test specifically designed to measure cyclic guanosine monophosphate (cGMP) levels in the body. cGMP is a crucial nucleopeptide that is synthesized from guanosine triphosphate (GTP) through the action of the enzyme guanylate cyclase. This molecule plays several vital roles in various physiological processes, including the conduction of ions across cell membranes, the breakdown of glycogen (glycogenolysis), and the regulation of programmed cell death (apoptosis). One of the key functions of cGMP is its ability to induce relaxation of smooth muscle tissues, which leads to vasodilation—an important mechanism that increases blood flow throughout the body. Additionally, cGMP is involved in the phototransduction process in the retina, which is essential for vision, as well as in the olfactory response, contributing to the sense of smell. Clinically, elevated plasma levels of cGMP have been associated with certain cardiovascular conditions, such as asymptomatic left ventricular dysfunction and class 1 heart failure, particularly following physical exertion. Furthermore, increased cGMP levels have been detected in amniotic fluid in cases of intra-amniotic infection, highlighting its potential role in various medical conditions.