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Official Description

Venipuncture, cutdown; younger than age 1 year

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

Venipuncture is a medical procedure that involves the puncturing of a vein to obtain blood samples or to administer medications. In the case of CPT® Code 36420, this procedure is specifically performed using a cutdown technique for patients who are younger than one year of age. The cutdown method is utilized when standard venipuncture techniques are not feasible due to the small size or depth of the veins in infants. This technique requires careful preparation of the site to ensure a sterile entry point. The skin is gently nicked to expose the vein, allowing for direct access. Once the vein is adequately exposed, a needle is inserted to collect the necessary blood samples or to deliver medications. It is important to note that for patients aged one year or older, a different code, CPT® Code 36425, should be used to reflect the procedural differences associated with older children and adults.

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