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Jason Catanzaro, MD

Pediatric Allergy & Immunology
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Patient type treated
Accepting new patients
Referral required
From physicians only
Board Certified in
Internal Medicine, Allergy Immunology (Internal Medicine) , and Pediatrics


Jason Catanzaro, MD, specializes in treating children with allergic disorders or primary immunodeficiencies, or when a patient’s immune system is not acting normal. These are usually caused by a genetic defect.

“I enjoy helping patients understand their condition and providing them with treatment options,” Dr. Catanzaro says. “What’s cool is helping kids feel better, whether it’s preventing or stopping infections or helping with allergies so they can play sports or enjoy the outdoors.”

Treatment options Dr. Catanzaro offers include allergy shots or immunoglobulin replacement therapy, a blood-based treatment to boost the body’s natural antibody levels and fight off infection. When it comes to reassuring patients, he tells them, “Every day is better than the last.”

Dr. Catanzaro’s research focuses on how gut microbiota (a collection of microorganisms including bacteria and viruses that live in the digestive tract) impact patients with primary immunodeficiencies. 


  • Assistant Professor of Clinical Pediatrics
  • Pediatric Allergy and Immunology Attending Physician

Education & Training

  • Fellow
    Yale School of Medicine (2017)
  • Resident
    Case Western Reserve University / University Hospitals Medical Center & Rainbow Babies and Children's Hospital (2012)
  • MD
    Temple University School of Medicine, Medicine (2008)
  • MS
    Arcadia University, Genetic Counseling (2002)
  • BS
    Lycoming College, Biology (1999)

Additional Information

  • 1 Long Wharf Drive
    New Haven, CT, 06511
  • Old Saybrook Medical Center
    633 Middlesex Turnpike
    Old Saybrook, CT, 06475