(An 8-day-old newborn, weighing 3 kilograms, is seen for a circumcision.

Newborn circumcision coding depends primarily on whether the circumcision is performed using aclamp/device techniqueversus asurgical excision technique. CPT54150is commonly associated with circumcision using a clamp or other device method (often described with a Gomco/Mogen-type approach in many training contexts). In contrast, CPT54160representssurgical circumcisionusing acircumferential incisionwith excision of the foreskin—matching the documentation (“circumferential incision… foreskin excised with a scalpel”). The infant’s age (8 days old) supports that this is a newborn service, but the decisive factor in this vignette is thetechnique described. Modifier-52(reduced services) is not supported because the full circumcision service is performed. Modifier-63applies to procedures performed on infants less than 4 kg for certain CPT codes when applicable, but it is not universally appended and is not the best answer here given typical CPC exam expectations for standard newborn circumcision technique identification. Therefore,54160is correct.