Kristen Nasto, MD Kristen Nasto, MD, is a Pediatrician at CHOP Primary Care, South Philadelphia, a CHOP Care Network pediatric and adolescent care practice. Areas of Expertise: Pediatric Primary Care Locations: Primary Care, South Philadelphia Appointments and Referrals: 1-800-TRY-CHOP (1-800-879-2467) Education and Training Medical SchoolJohns Hopkins School of Medicine, Baltimore, Md. ResidencyPediatric Residency The Children's Hospital of Philadelphia, Philadelphia, Pa. Board CertificationAmerican Board of Pediatrics Titles and Academic Titles Attending Physician