Nixa Maldonado, CMA Nixa Maldonado, CMA, is assistant clinic coordinator in the Special Immunology Service at The Children's Hospital of Philadelphia. Locations: Specialty Care, Market Street Appointments and Referrals: 1-800-TRY-CHOP (1-800-879-2467) Education and Training Board CertificationCertified Medical Assistant Titles and Academic Titles Assistant Clinic Coordinator Departments and Services Special Immunology Service