What patients are saying
Overall rating
4.94
Average wait time
4.89
Bedside manner
4.95
“My entire experience with was positive. Dr. Byrne was professional, kind, empathic, patient and encouraging. I felt a sense of relief knowing that I was in good hands with a professional who provided me with the information I needed after a long and unfortunate experience with a very disappointing physician with whom I want to forget.
I have confidence that my health and situation will improve with treatment and Dr. Byrne's expertise. I definitely would recommend the good doctor as necessary to my cohorts, etc. Thankful to make his acquaintance.
Sincerely, J. T. Nirenberg, Psyd. (retired clinical psychologist)
”
Joann T.Less than 1 month ago
“The doctor asked many questions and took his time. It’s wonderful to be able to see a dr who not bought out by any of the conglomerates!!! ”
Teresa G.January 22, 2026
About Dr. John Byrne
As an allergist, Dr. John Byrne is dedicated to diagnosing and managing allergies and immune disorders with expertise, experience and precision.
He has additional extensive experience in managing chronic dermatitis and all types of eczema, and utilizes extensive testing when appropriate, including Patch Testing (Contact Dermatitis Institute extensive panel) for detection of sensitivities to a multitude of ingredients to which we are exposed on a daily basis (in soaps, shampoos, lotions, topical medications, clothing, preservative, and dyes etc.)
He provides his services at East End Allergy and Asthma Care, PC, in Riverhead, NY.
Dr. Byrne specializes in identifying triggers and tailoring treatment plans that improve quality of life. His approach blends cutting-edge science with compassionate care, ensuring that patients not only find relief but also understand their condition.
Most importantly, he listens.
Dr. Byrne acquired his medical degree from New York Medical College. Certified by the American Board of Allergy and Immunology, he stays current with the latest advances and innovations in allergy care to offer the best possible outcomes. He also actively participates in the American Board of Allergy and Immunology “ Maintenance of Certification” program which assures a high level of current knowledge and competence in his field.
He is fully trained in Internal Medicine (Beth Israel Deaconess Medical Center, Harvard Medical School Teaching Hospital), and completed Allergy Fellowship at Stony Brook University Hospital).
Is this doctor in your insurance network?
Enter your insurance carrier and plan
choose insurance
In-network insurances
99% of patients have successfully booked with these insurances
Aetna
BlueCross BlueShield
Cigna
Emblem Health
Medicare
UnitedHealthcare
UnitedHealthcare Oxford
Areas of expertise
This doctor's experience enhances their expertise in similar cases. Below are the conditions or surgeries they treat most frequently.
Asthma
Allergic skin reaction with hives
Acute sinusitis
Chronic nose and throat inflammation due to allergies
Asthma
Allergic skin reaction with hives
Acute sinusitis
Chronic nose and throat inflammation due to allergies
Office location
Education and background
Practice names
Hospital affiliations
- Peconic Bay Medical Center
Board certifications
- American Board of Allergy and Immunology
Education and training
- Medical School - New York Medical College, Doctor of Medicine
- Stony Brook University Hospital (Fellowship)
- Beth Israel Deaconess Medical Center (Residency)
Awards and publications
- AWARDS AND HONORS: 1993-Present: -Member, Alpha Omega Alpha Medical Honor Society, Iota Chapter -Trustee Scholar Award New York Medical College -Candidate for the Seminar and Awards Ceremony at the Institutes of Health -New York Medical College James Matthew Hagadus, M.D., Good Physician Award New York Medical College -Dr. And Mrs. David Harrison Scholarship Award -New York Medical College Irving Innerfield, M.D., Ph.D., Memorial Award -New York Medical College Stephen P. Jewitt, M.D., Memorial Award -New York Medical College David Spiro, M.D., Memorial Award -New York Medical College -Upjohn Achievement Award for Clinical Skills -New York Medical College Citation for Service-Cor Et Manus New York Medical College -Healthgrades Honor Roll Healthgrades.com -Compassionate Doctor Recognition Vitals.com -On-Time Doctor Award Vitals.com -Patients’ Choice Award Vitals.com -Patients’ Choice Award 5th Anniversary(5 years) Vitals.com
Languages spoken
- English
Provider's gender
Male
NPI number
1144227208
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.94
Wait time
4.89
Bedside manner
4.95
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
52 reviews
Most relevant
He was amazing ,he was knowledgeable about my medical issues. His bedside manner was above all ,he truly cared about you .
February 25, 2025Heather H.Verified patient
I need an accessible, knowledgeable Allergist to manage my severe reactions. I think this Doctor fits the bill!
April 21, 2025Bernice R.Verified patient
Office wait was quick, Doctor was extremely competent and friendly. Dr. Made me feel comfortable.
September 9, 2025Robert M.Verified patient
Dr Byrne is a brilliant, kind and competent provider. I highly recommend him
September 4, 2025Jerry R.Verified patient
Great, very helpful, quick to take me in and very friendly! Will be going back and recommending.
November 28, 2024Aidan L.Verified patient
Good doctor, covered a lot of ground in a 20-minute appointment, listened to me.
July 14, 2025Danielle H.Verified patient
After explaining my problem, we discussed probable causes. Patch testing ordered & EXPLAINED
More than 1 year agoPW
Very professional, so happy to have found such a great doctor who listens and care .
September 18, 2024Ashreyaa B.Verified patient
Dr Byrne is knowable, professional and empathetic. He listens and communicates well.
September 12, 2024Initials hidden
Excellent doctor! Very thorough and kind. I highly recommend Dr. Byrne.
November 10, 2024Susan B.Verified patient
Very satisfied all the way around. Would definitely recommend.
September 30, 2024Barba r a. C.Verified patient
My entire experience with was positive. Dr. Byrne was professional, kind, empathic, patient and encouraging. I felt a sense of relief knowing that I was in good hands with a professional who provided me with the information I needed after a long and unfortunate experience with a very disappointing physician with whom I want to forget.
I have confidence that my health and situation will improve with treatment and Dr. Byrne's expertise. I definitely would recommend the good doctor as necessary to my cohorts, etc. Thankful to make his acquaintance.
Sincerely, J. T. Nirenberg, Psyd. (retired clinical psychologist)
Less than 1 month agoJoann T.Verified patient
The doctor asked many questions and took his time. It’s wonderful to be able to see a dr who not bought out by any of the conglomerates!!!
January 22, 2026Teresa G.Verified patient
Excellent and kindhearted doctor
January 13, 2026Eldred J.Verified patient
Brilliant Provider, knows his stuff
October 7, 2025Susan V.Verified patient
I would and will go back
September 4, 2025Judith C.Verified patient
I am writing this after only one visit. The woman at the front desk was kind, but in my anticipation of the appointment, I forgot her name.
There was no wait time, I didn’t even have time to fill out the HIPPA form before the doctor was ready for me.
Dr. Byrne really listened, was kind, was very knowledgeable, and was thorough in the investigation of symptoms, history and testing. I am hopeful that I will have actionable solutions after so many years of just getting more labels for the ailments.
10/10 experience.
July 17, 2025Marissa B.Verified patient
I feel very comfortable and assured about my appointment. I felt heard, he listened to me about everything and? and gave me very reasonable expectations. ?
June 16, 2025Kathie B.Verified patient
Dr. Byrne is VERY smart and thinks out of the box if and when necessary. He cares about his patients. My appointment was not rushed in any way. Kathy at the front desk was very helpful and pleasant.
May 23, 2025Virginia T.Verified patient
I truly liked this doctor, he was easy to talk to and to understand. I also learned a lot. I have another appointment. He made me feel very comfortable.
I would definitely recommend him.
Less than 1 year agoDiane M.Verified patient
Dr. Byrne and his assistant were very kind and helpful, and are both eager to solve my allergy issues. His recommended care and first steps gave me relief right away, and we are now going through the process of finding triggers so I don't have to suffer through extreme symptoms in the future. Thank you!
April 20, 2025Christine H.Verified patient
Dr. Byrne respects his patience and listens to their concerns. With his understanding and knowledge he determines what appropriate test to be done.
I have never waited more than 10 minutes in his office for my scheduled appointment. I really appreciate that.
March 2, 2025Maxine N.Verified patient
Found the final piece of my healthcare team. Although only mildly asthmatic I know how important it is to monitor my overall health. Very pleased with the addition of Dr Byrne to my wellness team. He is a great communicator and listened to my concern. I look forward to working with him in the years ahead.
February 24, 2025Robert B.Verified patient
Very thorough!
More than 1 year agoMaryanne G.Verified patient
Great doctor!
January 13, 2025Tina M.Verified patient
Extremely knowledgeable in his field, minimal wait time, developed a plan of action for my condition. Very positive experience.
December 11, 2024Philip W.Verified patient
Great Dr I would recommend him
November 25, 2024Nathan W.Verified patient
Dr Byrne is the absolute best! He went over and above to help me get to the bottom of my food allergy. After eating at a restaurant and having an anaphylactic reaction to something I ate, Dr Byrne did a skin test to check for any food allergies and then reached out to the restaurant to get a list of the ingredients in the meal I had eaten. After not hearing back, Dr. Byrne actually drove to the restaurant himself to get a list of the ingredients!! He discovered I was allergic to barley and confirmed there was malted barley flour in the meal I ate. In the modern age of medicine where they rush you in and rush you out Dr. Byrne is a rare gem. He is so knowledgeable and not afraid to think outside the box. I can’t recommend him highly enough!!
More than 1 year agoCM
Doctor Byrne is a very professional doctor, he listens to your issues gives you the opportunity to engage in the conversation and always ask the right questions concerning your health, He gives you options on how to approach your treatment.
His office has a convenient location with plenty of parking .
More than 1 year agoPA
March 31, 2026Barbara C.Verified patient
February 10, 2026Dipti S.Verified patient
January 12, 2026Stephen K.Verified patient
Less than 6 months agoInitials hidden
December 12, 2025chamanad R.Verified patient
Less than 6 months agoInitials hidden
Less than 1 year agoClement P.Verified patient
August 21, 2025Susan V.Verified patient
Less than 1 year agoInitials hidden
Less than 1 year agoInitials hidden
July 9, 2025Cheryl S.Verified patient
July 9, 2025Danielle O.Verified patient
Less than 1 year agoInitials hidden
May 12, 2025Initials hidden
May 1, 2025Claudia S.Verified patient
Less than 1 year agoInitials hidden
March 24, 2025Lisa D.Verified patient
February 12, 2025Robert F.Verified patient
More than 1 year agoInitials hidden
November 11, 2024Robert F.Verified patient
More than 1 year agoInitials hidden
Loading...
How soon can I make an appointment with Dr. John Byrne?
Generally, Dr. John Byrne has appointments available on Zocdoc within 1 week. You can see Dr. Byrne's earliest availability on Zocdoc and make an appointment online.
Is Dr. John Byrne accepting new patients?
Dr. John Byrne generally accepts new patients on Zocdoc. You can see Dr. Byrne's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. John Byrne accept my insurance?
Choose your insurance plan to verify if Dr. Byrne is in-network.
Can I make an appointment with Dr. John Byrne online?
Yes, you can make an appointment online with Dr. Byrne using Zocdoc. It’s simple, secure, and free.
Which hospital is Dr. John Byrne affiliated with?
Dr. John Byrne is affiliated with Peconic Bay Medical Center.
What practice does Dr. John Byrne work with?
Dr. John Byrne works with East End Allergy and Asthma Care, PC.
Where is Dr. John Byrne's office located?
Dr. John Byrne's office is located at 1149 Old Country Rd, Riverhead, NY 11901.
Which board certifications does Dr. John Byrne have?
Dr. John Byrne is certified by American Board of Allergy and Immunology.
What are common reasons for patients to see Dr. John Byrne?
Dr. John Byrne frequently sees patients for Allergy Consultation, Allergy Testing, Illness, Infection Consultation, and Rash. You can see other visit reasons for Dr. John Byrne on their profile.
What languages does Dr. John Byrne speak?
Dr. John Byrne speaks English.
How do patients rate Dr. John Byrne in reviews?
52 patients have reviewed Dr. John Byrne. The overall rating for this doctor is 4.94/5. They have a 4.95/5 rating for bedside manner and a 4.89/5 rating for wait time. You can read individual reviews and ratings on their profile.