Margaret Hesser, MSN, BSN, CRNP Margaret Hesser, MSN, BSN, CRNP, is a nurse practitioner with CHOP Primary Care, Flourtown, PA. Locations: Primary Care, Flourtown Appointments and Referrals: 1-800-TRY-CHOP (1-800-879-2467) Education and Training Board CertificationBasic Life Support (BLS)Certified Pediatric Nurse Practitioner - Primary Care (CPNP-PC)Undergraduate DegreeBSN - University of Miami, Miami, FL Graduate DegreeMSN, Pediatric Primary Care - University of Pennsylvania, Philadelphia, PA Titles and Academic Titles Nurse Practitioner