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Dr. Guillen is on Doximity

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Education & Training

  • Children's Hospital of Philadelphia
    Children's Hospital of PhiladelphiaFellowship, Neonatal-Perinatal Medicine, 2007 - 2010
  • Yale-New Haven Medical Center
    Yale-New Haven Medical CenterResidency, Pediatrics, 2004 - 2007
  • University of North Carolina at Chapel Hill School of Medicine
    University of North Carolina at Chapel Hill School of MedicineClass of 2004

Certifications & Licensure

  • DE State Medical License
    DE State Medical License 2010 - 2025
  • MD State Medical License
    MD State Medical License 2010 - 2024
  • PA State Medical License
    PA State Medical License 2007 - 2010
  • American Board of Pediatrics Pediatrics
  • American Board of Pediatrics Neonatal-Perinatal Medicine

Clinical Trials

Publications & Presentations

PubMed

Other Languages

  • Spanish, French, Portuguese

Hospital Affiliations