Client Referrals or Inquiries All outside calls received that are not related to a currently enrolled Gilead client, but are of a clinical nature should call our Middletown Outpatient Clinic at # 343-5303. Gilead's Administrative Office 222 Main Street Extension Middletown, CT 06457 (860) 343-5300 Outpatient Clinic in Middletown 681 Saybrook Road Middletown, CT 06457 (860) 343-5303 Outpatient Clinic in Essex 180 Westbrook Road, Suite 5 Essex, CT 06426 (860) 767-2025 For a list of staff and specific extensions, click here.