CPT® Code 99157

Add-On Code

Moderate sedation services provided by a physician or other qualified health care professional other than the physician or other qualified health care professional performing the diagnostic or therapeutic service that the sedation supports; each additional 15 minutes intraservice time (List separately in addition to code for primary service)

Moderate sedation services refer to the administration of sedative agents to a patient undergoing a diagnostic or therapeutic procedure, where the sedation is provided by a physician or other qualified healthcare professional who is not the one performing the procedure itself. This service is crucial for ensuring that the patient remains comfortable and relaxed during the procedure, while still being able to respond to verbal commands and maintain their own airway. The process begins with a thorough patient assessment to evaluate their medical history and current health status. An intravenous (IV) line is then inserted to facilitate the administration of fluids and sedative medications as needed. Throughout the procedure, the patient's level of consciousness and vital signs—including oxygen saturation, heart rate, and blood pressure—are closely monitored to ensure their safety and well-being. After the procedure is completed, the healthcare professional continues to observe the patient until they have sufficiently recovered from the effects of the sedation, at which point the patient can be safely handed over to nursing staff for ongoing care. For billing purposes, the CPT® code 99157 is specifically designated for each additional 15 minutes of intraservice time beyond the initial sedation period, which is captured using codes 99155 for patients younger than 5 years and 99156 for patients aged 5 years or older.