MODERATE SEDATION SERVICES PROVIDED BY THE SAME PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL PERFORMING THE DIAGNOSTIC OR THERAPEUTIC SERVICE THAT THE SEDATION SUPPORTS, REQUIRING THE PRESENCE OF AN INDEPENDENT TRAINED OBSERVER TO ASSIST IN THE MONITORING OF THE PATIENT'S LEVEL OF CONSCIOUSNESS AND PHYSIOLOGICAL STATUS; INITIAL 15 MINUTES OF INTRASERVICE TIME, PATIENT YOUNGER THAN 5 YEARS OF AGE