CPT® Code 36120

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The procedure described by CPT® Code 36120 involves the introduction of a needle or intracatheter into the brachial artery using a retrograde approach. This means that the needle or catheter is inserted in a direction opposite to the normal flow of blood in the artery. The brachial artery, located in the upper arm, is accessed by first locating it through palpation, which is the process of feeling the artery with the fingers. Once located, the artery is stabilized between the index and middle fingers to ensure accurate placement. The needle or intracatheter is then introduced through the skin and advanced toward the artery until it makes contact with the artery wall, at which point the artery is punctured. After puncturing the brachial artery, the needle may remain in place, or an intracatheter can be advanced further into the artery. This retrograde technique allows for the catheter to be navigated into larger vessels such as the axillary, subclavian, or innominate arteries. The procedure may also involve the injection of medication or radiopaque contrast material as necessary, which aids in imaging or therapeutic interventions. This code specifically pertains to the brachial artery, distinguishing it from other codes that refer to the introduction of needles or catheters into different extremity arteries, such as the radial or femoral arteries.