Clinical Policy Bulletin: Anesthesia Services for Gastrointestinal Endoscopy Aetna Policy United Healthcare Propofol Donald E. Arnold M.D. - ASA Director, Missouri - Letter to Troyen Brennan, Senior Vice President-AETNA Donald E. Arnold M.D. - ASA Director, Missouri - Letter to Burton Vanerlaan, Regional Medical Director-AETNA Jeffery Apfelbaum M.D., President ASA -Letter to Troyen Brennan, Senior Vice President-AETNA American Gastroenterological Association - Letter to Aetna Regarding Sedation Policy