Mariann M. Giannone, BS, RDMS Mariann M. Giannone, BS, RDMS, is a perinatal sonographer with the Center for Fetal Diagnosis and Treatment at The Children's Hospital of Philadelphia. Locations: Main Campus Phone: 1-800-468-8376 Education and Training Board CertificationOb/Gyn, Abdominal, Neurosonography, Fetal EchocardiographyUndergraduate DegreeBS - Thomas Jefferson University, Philadelphia, PA Titles and Academic Titles Perinatal Sonographer Departments and Services Center for Fetal Diagnosis and Treatment