Dr. Masiakos is a pediatric and neonatal general surgeon who is an internationally recognized pediatric trauma surgeon and injury prevention specialist. He is a current member of the American College of Surgeons Committee on Trauma.


Pediatric Surgery


Centers & Specialties

MassGeneral Hospital for Children

Trauma Center

Clinical Interests
  • Trauma and injury prevention
  • Minimally invasive pediatric surgery
  • Esophageal anomalies
  • Thyroid surgery
  • Pediatric Neoplasms
  • Pediatric thoracic surgery
  • Pilonidal disease
  • Chest Wall Deformities (Pectus excavatum & Pectus Carinatum)
  • Inflamatory Bowel Disease
Medical Education
  • MD, Boston University School of Medicine
  • Residency, Boston Medical Center
  • Fellowship, Toronto Hospital for Sick Children
Board Certifications
  • Surgery
  • Pediatric Surgery
Foreign Languages
  • Greek
  • Boston: Massachusetts General Hospital
  • Newton: Newton-Wellesley Hospital
Patient Gateway
Yes, learn more
Insurances Accepted
  • Aetna Health Inc.
  • Beech Street
  • Blue Cross Blue Shield - Blue Care 65
  • Blue Cross Blue Shield - Indemnity
  • Blue Cross Blue Shield - Managed Care
  • Blue Cross Blue Shield - Partners Plus
  • Cigna (PAL #'s)
  • Fallon Community HealthCare
  • Great-West Healthcare (formally One Health Plan)
  • Harvard Pilgrim Health Plan - ACD
  • Harvard Pilgrim Health Plan - PBO
  • Health Care Value Management (HCVM)
  • Humana/Choice Care PPO
  • MassHealth
  • Medicare
  • Medicare - ACD
  • Neighborhood Health Plan - ACD
  • Neighborhood Health Plan - PBO
  • OSW - Connecticut
  • OSW - Maine
  • OSW - New Hampshire
  • OSW - Rhode Island
  • OSW - Vermont
  • Private Health Care Systems (PHCS)
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Unicare
  • United Healthcare (non-HMO) - ACD
  • United Healthcare (non-HMO) - PBO

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.

Patient Age Group
Pediatric and Adult

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Peter T. Masiakos, MS, MD, FACS, FAAP is a Pediatric General and Thoracic Surgeon at MGH and Associate Professor at Harvard Medical School. He was trained at the Boston City Hospital and Hospital for Sick Children (Toronto), where he developed a clinical interest in pediatric trauma care and injury prevention. He is the director of the pediatric trauma surgery service at MGH and has become a vocal injury prevention advocate. He has broad interest in clinical surgery with a focus on esophageal anomalies, thyroid surgery and pilonidal disease. He has also been involved in successfully educating the Massachusetts legislature and the US Congress on the inherent risks that that certain products pose to children and has testified both at the Massachusetts state house and at the consumer product safety commission on the need for new legislation which would prohibit the use of ATVs within specific age groups.  He has aided in the development and passage of several forward thinking injury prevention laws and continues to work alongside Massachusetts State Legislators and the Congress on several other comprehensive injury prevention laws including junior operator laws, safe driving laws and child restraint laws.

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Research & Publications


View my most recent publications at PubMed

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News & Events


Pediatric Surgery
55 Fruit Street
Boston MA, 02114-2696
Phone: 617-726-8839
Fax: 617-726-2167

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