Our Physicians

Jennifer Diaz, M.D.

Jennifer Diaz, M.D.

Jennifer M. Diaz, MD, a native of Suffolk County, graduated with a Bachelor of Science from Boston College, after which she spent a year in the National Institutes of Health (NIH) research training program in Bethesda, Maryland. She went on to earn her Medical Degree at New York Medical College in Valhalla, New York. She then served her Pediatric Internship and Residency at North Shore-Long Island Jewish Health System at the Steven & Alexander Cohen Children’s Medical Center of NY. After her residency, she was appointed Chief Resident in the Division of Pediatrics.

She was then the recipient of a competitive NIH grant to complete her Allergy and Immunology fellowship training at North Shore-Long Island Jewish Health System with a focus on obesity and its effects on asthma.

Dr. Diaz is Board Certified by the American Board of Pediatrics and the American Board of Allergy and Immunology, and is a member of numerous professional societies, including the American Academy of Allergy, Asthma and Immunology (AAAAI), American College of Allergy, Asthma and Immunology (ACAAI),Long Island Allergy and Asthma Society (LIAAS), New York Allergy and Asthma Society (NYAAS). In addition, she has authored and contributed to a number of professional publications and presentations at national conferences.

Dr. Diaz has experience in treating both adults and children with a wide range of allergic diseases ranging from asthma and allergic rhinitis to food allergy and atopic dermatitis. She is proficient in epidermal and intradermal allergen testing, food challenges, drug desensitizations, as well as immunotherapy preparation and administration.



Jennifer Diaz, M.D. accepts the following insurance plans:

Port Jefferson Office:
  • Aetna HMO
  • Aetna PPO
  • Affinity Health Plan
  • Agewell
  • BC/BS Empire NY
  • BC/BS Empire NY Pathway
  • BC/BS HealthPlus
  • Beech Street
  • CareConnect NSLIJ
  • Cigna
  • Elderplan
  • EmblemHealth/GHI PPO
  • Empire Plan (UHC)
  • Fidelis
  • HIP
  • HealthCare Partners IPA
  • HealthSmart WTC
  • Island Group
  • Local 1199
  • MagnaCare
  • Medicare
  • MultiPlan
  • Oxford Freedom
  • PHCS
  • Railroad Medicare
  • Tricare
  • US Family Health
  • United HealthCare
  • Vytra Health Plans
  • WTC Health For Heros
  • Wellcare
Languages spoken:
  • English
  • Spanish

Port Jefferson

1500 Route 112
Building # 4, 2nd floor
Port Jefferson Station, NY, Suffolk County, Long Island

Tel: (631) 928-0188

Fax: (631) 928-0185

Hospital Privileges:
  • St. Charles Hospital (CHS)
  • John T. Mather Memorial Hospital (CHS)

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