Welcome to The Allergy and Asthma Centers of Cape Cod

Welcome to The Allergy and Asthma Centers of Cape Cod! As the only allergy specialists serving Cape Cod and the Islands, we’ve been dedicated to providing personalized, compassionate care for over 40 years. Whether you’re dealing with seasonal allergies, pet allergies, food allergies, or asthma, our team is here to help.

Meet Your Health Partners

Our experienced team is led by Dr. John Johnson Jr., a board-certified allergist. We're committed to providing the highest quality healthcare to adults and children suffering from allergies, asthma, and related conditions. With a strong belief in patient education and a personalized approach, we strive to make each patient feel cared for, heard, and empowered.

Hi! I'm Dr. Johnson and I am a board-certified allergist and immunologist. Our team is here to help you navigate your conditions using the skills and training we have gained through our medical training.

By operating as a team with our patients we have been able to be the first to diagnose green tea-induced anaphylaxis, pumpkin seed-induced anaphylaxis, bay leaf (spice) allergy, and garlic-induced food protein-induced entercolitis syndrome.

I am always looking for ways to further the field of allergy-immunology and by doing so I have more than 20 peer reviewed publications, a published a book chapter on asthma, over 10 invited presentations to peers, including national conferences. Also, I was fortunate to present anaphylaxis to consulates representing countries throughout the world, which was recognized with a commendation from the State of New Hampshire Governor for advancing the field of allergy & immunology.

I was very fortunate to be 1 of 8 college students in the Northeast U.S. awarded an American Heart Association research grant, which served to ignite my passion for research. My research initially focused on tissue-engineered, replacement heart valves for children at Boston Children’s Hospital in collaboration with Harvard Medical School and Massachusetts Institute of Technology. These contributions were published in Circulation, the premier cardiology research journal. Subsequently, at the University of Central Florida - College of Medicine, the research I contributed on Huntington’s Disease was published on the cover of Nature Medicine.

I hold memberships to a number of relevant organizations including, but not limited to, the American Academy of Allergy, Asthma, and Immunology, American College of Allergy, Asthma, and Immunology, the New England Society of Allergy, American Association of Immunologists, Clinical Immunology Society, Society for Pediatric Dermatology, and American Contact Dermatitis Society

Our Comprehensive Services

We offer a range of comprehensive services tailored to diagnose and improve your allergy and asthma related conditions. Our offerings include advanced diagnostic tests, personalized treatment options, and specialized programs. Visit our ‘Services’ page for more in-depth information.

Allergy Testing

Our clinic provides comprehensive allergy testing services to identify the specific allergens triggering your symptoms.

Asthma Diagnosis and Treatment

Our experienced team of doctors specializes in diagnosing and treating asthma.

Navigating the Path to Health: Conditions We Treat

At The Allergy and Asthma Centers of Cape Cod, we specialize in the diagnosis and management of a range of conditions that may be impacting your quality of life. Here’s a snapshot of what we address:

Seasonal Allergies

Do seasonal changes leave you sneezing and congested? Find out more about the symptoms, our comprehensive diagnostic procedures, and our personalized treatment strategies for managing seasonal allergies.

Pediatric Allergies

Battling allergies related to your furry companions? Learn about the tell-tale signs, our testing methods, and available treatments to help you continue living comfortably with your pets.


Worried about your child’s sneezing, itching, or wheezing? We offer specialized care for our younger patients with allergies and guide families through understanding and managing these conditions.


Is asthma creating hurdles in your day-to-day life? Unearth the ways we can assist you with diagnosing, managing, and treating this condition to help you regain control.

Pet Allergies

Plagued by unexplained outbreaks of hives? Understand more about this condition, its possible triggers, and how we can help mitigate its effects.

Sinus Conditions

Suffering from recurrent sinusitis or other sinus-related issues? Discover how we identify and treat a variety of sinus conditions to provide you with much-needed relief.

Food Allergies

Concerned about potential food allergies within your family? Explore more about identifying symptoms, our detailed diagnostic methods, and how we can guide you through necessary dietary adjustments.

Hives (Urticaria)

Is eczema causing discomfort and affecting your skin’s health? Learn about the symptoms, causes, and our approach to treating this skin condition.