Maryellen Grysewicz, RN, C, ACRN Maryellen Grysewicz, RN, C, ACRN, is a nurse 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 Additional TrainingDiploma in Nursing, Sacred Heart Hospital School of Nursing, Allentown, PA Board CertificationGeneral NursingHIV Nursing Titles and Academic Titles Clinical Nurse Departments and Services Special Immunology Service Patient Experience Ratings About the Patient Experience Rating System The Patient Experience Rating is an average of all responses to the care provider related questions shown below from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question. Responses are measured on a scale of 1 to 5 with 5 being the best score. The comments are submitted by patients and families and reflect their views and opinions. The comments are not endorsed by and do not reflect the views of Children’s Hospital of Philadelphia.