Long Island Allergy & Immunology

Meet Dr. Louis E. Guida, Jr.

  • 36 Years of Experience 

  • Accepts Most Health Insurances

  • Award-Winning & Recognized Medical Leader

  • Board Certified Allergist & Immunologist

  • Four Convenient Long Island Locations

  • Top-Rated Allergist & Immunologist In New York


Board Certified in Allergy, Asthma and Immunology, Pediatrics

Dr. Louis E. Guida Jr. is a renowned Allergy & Immunologist with over 36 years of experience diagnosing, treating, and managing allergies, asthma, and immune disorders for members of the communities of Long Island, New York. Dr. Guida was initially awarded his medical degree from St. George’s University School of Medicine. He completed his internship and residency in Pediatrics at Monmouth Medical Center, Long Branch, New Jersey. He went on to complete two fellowships – Cystic Fibrosis (Adult and Pediatric) and Pediatric Pulmonology at Hahnemann University Hospital in Philadelphia, Pennsylvania, and Adult & Pediatric Allergy / Immunology at Nassau County Medical Center in East Meadow, New York.

Dr. Guida’s hospital affiliations are Good Samaritan Hospital Medical Center in West Islip, New York, and St. Charles Hospital, Port Jefferson, New York. He is an adjunct clinical assistant Professor of Pediatrics at the New York College of Osteopathic Medicine. He is the Medical Director of the adult and pediatric Cystic Fibrosis Programs and the Family Asthma and Allergy Center at Good Samaritan Hospital Medical Center. He is a fellow of the American Academy of Allergy, Asthma and Immunology, American College of Chest Physicians and the American Academy of Pediatrics.

Allergy Specialties

  • Adult & Pediatric Asthma
  • Allergy
  • Pulmonology 

Hospital Affiliations

  • Good Samaritan Hospital Medical Center
  • St. Charles Hospital

Fellowships & Memberships

  • Fellow of The American Academy of Allergy, Asthma and Immunology
  • Fellow of The American Academy of Pediatrics
  • Fellow of The American College of Allergy, Asthma and Immunology
  • Fellow of the American College of Chest Physicians
  • New York Allergy Society
  • Long Island Allergy Asthma Society
  • Cystic Fibrosis Foundation
  • American Medical Association
allergist near me
Heart and Health Medical Doctors

Long Island Allergy Specialists

Team Approach To Allergy & Immunology Care

The allergy, asthma, and immunology team of Heart & Health diagnose, treat, and manage immunologic conditions including allergies, asthma, autoimmune diseases, autoinflammatory syndromes, and immunological deficiency syndromes. Like most patients suffering from allergies, you have probably been searching the internet for an “allergist near me,” contact Heart & Health Medical. Led by renowned Allergist Dr. Louis E. Guida, Jr., the team at Heart and Health Medical is comprised of board-certified Allergists and Immunology specialists and equipped with the most advanced equipment and facilities in Long Island, New York.

Allergy Specialist Near me

Ilyse Febbraro, MSN, FNP-C

Board Certified by the American Academy of Nurse Practitioners

Ilyse completed her Bachelor’s Degree of Science in Nursing at Stony Brook University in 2012 and graduated Summa Cum Laude.  She worked as a registered nurse at Stony Brook University Hospital for over five years on a busy medicine-telemetry unit as well as a respiratory care and chronic ventilator unit. While working as a nurse, Ilyse went back to school and studied to become a nurse practitioner.  In 2017, Ilyse earned her Master’s Degree of Science in Nursing after completing the Family Nurse Practitioner Program at Stony Brook University.  Ilyse is board certified by the American Academy of Nurse Practitioners.  While pursuing her NP degree, Ilyse completed a clinical rotation in asthma, allergy and immunology and soon discovered that this was her passion.  She has been working as a nurse practitioner specializing in allergy, asthma and immunology since 2017.  Ilyse treats a wide variety of patients, including but not limited to patients with asthma, environmental allergies, food allergies, eczema, immune deficiencies and other atopic conditions. Ilyse is dedicated to improving her patients’ overall quality of life.

Allergy & Immunology Conditions

Learn More About Allergy Testing & Treatment

Common Allergens:
  • Animal dander
  • Dust
  • Food
  • Insect stings
  • Latex
  • Medications/Drugs
  • Mold
  • Pollen
Common Allergy Symptoms:
  • Hay fever
  • Headache
  • Hives
  • Itchy, red, watering eyes (conjunctivitis)
  • Red skin, cracked and dryness
  • Skin Rash
  • Sneezing and an itchy, runny or blocked nose (allergic rhinitis)
  • Sore Throat
  • Stomach pain, feeling sick, vomiting or diarrhea
  • Swelling in the lips, tongue, eyes or face
  • Wheezing, chest tightness, shortness of breath and a cough

Find An Allergist Near Me

Dr. Guida and the Allergy & Immmunology team of Heart and Health provide care for allergy patients in four locations Massapequa, Plainview, Coram, North Babylon.

Looking For An "Allergist Near Me"?

Allergy & Immunology Offices In Long Island

Find An Allergy & Immunology Office In Your Area

Heart and Health Medical Has Local Offices Across Long Island. Get Directions To An Allergy Specialist Near You.

Looking for an allergist near you? Your search ends here at Heart and Health Medical. Our team of experienced allergists and immunologists is dedicated to providing comprehensive allergy care to patients in Nassau County and Suffolk County, Long Island. With multiple convenient locations, including Plainview, North Babylon, Coram, and Massapequa, you can easily find the allergy specialists you need.

At Heart and Health Medical, we understand the impact allergies can have on your quality of life. Whether you’re dealing with seasonal allergies, food allergies, asthma, or other allergic conditions, our allergists are here to help you breathe easier and live symptom-free. We offer a range of services, including allergy testing, immunotherapy, and personalized treatment plans tailored to your specific needs.

Don’t let allergies hold you back from enjoying life to the fullest. Take the first step toward relief by scheduling an appointment with our allergists today. Your path to allergy-free living starts right here at Heart and Health Medical.

Schedule An Appointment

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