Dr. Boyan Hadjiev M.D., Allergist and Immunologist

Dr. Boyan Hadjiev M.D.

Allergist and Immunologist | Allergy & Immunology

30 East 40th Street Suite 1200 New York New York, 10016



Boyan Hadjiev, MD, obtained his medical degree in 2000 from Case Western Reserve University School of Medicine in Cleveland, Ohio. He continued to complete his residency for internal medicine at the North Shore Long Island Jewish Health System and Albert Einstein College of Medicine in 2003; and fellowship for allergy and immunology at the same institutions in 2005. From 2009 to 2010, Hadjiev was a recipient of various awards from Vitals.com including the 'Compassionate Doctor Recognition,' 'Patients Choice Award,' and 'On-Time Physician Award.' He is a member of the American Academy of Allergy Asthma and Immunology and the American Medical Association. Listening to patients and educating patients about their health, he says, are instrumental to his success. Today, he practices adult and pediatric allergy, asthma, sinusitis medicine at the Advanced Allergy, Asthma and Sinusitis Center in New York.

Education and Training

Case Western Reserve University School of Medicine; Cleveland


University of Michigan, Ann Arbor, Mi B.A. in Biology 1996

Board Certification

Allergy and Immunology

Internal Medicine

Internal MedicineAmerican Board of Internal MedicineABIM- 2013

Allergy and ImmunologyAmerican Board of Allergy and ImmunologyABAI- 2015

Provider Details

Male English, Spanish, French, Russian, German, Italian 21 years of experience
Dr. Boyan Hadjiev M.D.
Dr. Boyan Hadjiev M.D.'s Expert Contributions
  • What can I do for my son's seasonal allergy?

    Yes. There are! There are shots and there are drops and also medicine. READ MORE

  • How old must a child be for an allergy test?

    Your daughter certainly can get tested as a 9 year-old. If necessary and indicated, we do test children much younger than 9 (infants, toddlers and babies). READ MORE

  • Can having seasonal allergies make hearing difficult?

    Yes. Yes it can. Due to congestion or due to effusion in middle ear (usually not an infection) or due to Eustachian tube dysfunction. Please discuss with your daughter’s pediatrician or with her specialist provider (allergist, etc.) Best regards. READ MORE

  • How should one deal with an allergy to dust?

    Allergy to (household) dust/dust mites is quite common, so do not feel bad about that. You did not mention if your daughter also has asthma or eczema, but the way we approach is by reducing exposure to dust/dust mites (mattress and pillow encasings, removal or rugs/carpeting and plush toys,etc.) and by treating with medicines and/or adding on dust mite immunotherapy. All of this would need discussion with your local allergy physician specialist. Hope this helps! READ MORE

  • Tested positive for allergy, but never had reaction. Normal?

    It happens a lot, actually. You have a positive test, and yet you have no reaction to eating soy or soy products. To give you a simplified explanation - the test is “overly sensitive.” I do not know the specifics of your test or why you saw your doctor, but this situation can happen. READ MORE

  • Are there any allergy shots for seasonal allergies?

    Yes, there are allergy shots for seasonal allergies. Go see your favorite local allergy specialist!! READ MORE

  • Should my son be taking Benadryl?

    You can try giving him Claritin or Allegra or Zyrtec instead of giving Benadryl. You may also try eye drops such as Zaditor, which is also available over the counter READ MORE

  • Is there a cure for dust allergies?

    Yes. There are allergy shots for dust mites/dust and also sublingual drops/pills for dust mite allergy. I hope this information helps. READ MORE

  • What are the symptoms of a nickel allergy?

    Nickel allergy, aka Allergic Contact Dermatitis is one of the most common contact allergies. So, yes, you could have a contact allergy to nickel. Another condition which resembles nickel (contact) allergy is irritant dermatitis. You cannot wear this ring and see what happens. You can also apply hydrocortisone cream on the rash. You can also see your doctor, if you want to know for sure. Hope this information helps. READ MORE

  • Will allergy shots prevent an allergic reaction completely?

    The answer is yes. Or possibly yes. Allergy shots do work for the majority of allergy patients. There are several variables which can increase the efficacy of your allergy shots. READ MORE

  • How serious are peanut allergies?

    They can be severe and life-threatening or milder. On average one in five children can outgrow peanut allergies, but most children do not. Children with peanut allergies can be desensitized to peanuts and peanut products via several methods. One of the most common methods is called oral immunotherapy which introduces small amounts of peanut protein by mouth daily, with bi-weekly or monthly increases of the dose of the peanut protein. I strongly encourage you to consider peanut desensitization with your local healthcare specialist, as it can be life-changing READ MORE

  • Is lactose intolerance a lifelong condition?

    There are 4 types of lactose intolerance, if you look at the genetic makeup of people. So, while nobody can say for sure if your nephew will “outgrow” lactose intolerance (lactase deficiency) later, it makes it less likely. This is assuming you have the correct diagnosis. READ MORE

  • My throat feels scratchy. Is it an allergic reaction?

    Yes. This could be and most likely is an allergic reaction to pollen, most likely tree pollen. READ MORE

  • Can an inhaler help me treat my allergies?

    If you have allergic asthma or allergy-induced bronchospasms, the inhaler could/would help you breathe better. It will not treat OTHER symptoms of allergies such as itchy eyes or runny nose or post-nasal drip or itchy throat, etc. READ MORE

  • Does milk improve immunity?

    From an immunity persoective, I cannot see a reason why NOT drinking milk should be a problem. From a nutrition aspect, it may decrease intake of calcium and energy intake in the form of fats and proteins. Also, there may be a reason why your child does not like milk - lactose intolerance (unlikely) or simply taste or texture. You can discuss it with the pediatrician READ MORE

  • Are antihistamines safe to be consumed during pregnancy?

    You can take either cetirizine (generic Zyrtec) 10mg or loratadine (generic Claritin) 10mg during pregnancy. In general, you can Google “name of medicine” pregnancy category and find out the safety profile of a medication. You can always consult your OB doctor or your regular doctor too. READ MORE

  • My daughter was wheezing yesterday after playing with our cat. Why did this happen suddenly?

    Your daughter may have developed allergies to cats, or may be wheezing independently. It would be best to consult a healthcare provider for a more accurate answer (allergist, pediatrician, etc.) READ MORE

  • Can sand trigger skin allergies?

    Well, it would be really difficult to tell what exactly is going on without having a look. Having said that, sand is an inorganic mixture of silica and other compounds and it is unlikely that this is a true allergy. It is more likely an irritant reaction (abbrasions) or something else is mixed in with the sand which is causing the reactions. Please consult with your medical provider READ MORE

  • Can anaphylaxis or severe allergies appear out of nowhere?

    Yes. This is possible. Without knowing more, it would be difficult to answer this question. Please get a professional opinion. READ MORE

  • Do antihistamines cause excessive sleepiness?

    Yes. This is a normal effect. You can switch to another type of antihistamine such as fexofenadine or loratadine. READ MORE

  • I have noticed loose stools every time I eat watermelon. What could be the reason?

    You may intolerant to fructose. Or, it may just be that consuming excess liquids gives you loose stools. You are unlikely to be allergic. READ MORE

  • What causes my eyes to water in the morning?

    Yes. You could be having allergies to your new environment. If it bothers you, please get it checked out. READ MORE

  • I have an allergic rash on the head of my penis. What could it be?

    It would be hard to tell you what is wrong without a visual inspection, which for obvious reasons is not possible on this forum. Having said that, possible explanations include eczema (atopic dermatitis), psoriasis, contact dermatitis, or irritant dermatitis (irritation). You cannot rule out STI completely, but your explanation makes it less likely. My advice is to get it checked out with a healthcare professional. READ MORE

  • How is poison oak allergy treated?

    Assuming you are allegic to poison oak (and poison ivy or poison summac), the treatment would consist of avoidance (if possible), a corticosteroid cream if a rash occurs and (if warranted by severity) an oral corticosteroid medication such as prednisone (or others) Hope this answers your questions READ MORE

  • My face feels itchy. Could this be because of a food allergy?

    Hello! Given the limited amount of information provided, I suspect that this is not a case of true food allergy. READ MORE

  • I get itchy every time I'm around a dog. Is this an allergy

    Yes, this does sound like an allergy to dogs. You should seek qualified medical help and see how best to manage your symptoms as there are many treatment options. READ MORE

  • Are Avil and Cetrizine the same when it comes to treating an allergic reaction?

    If you mean Advil and not Avil, then no. Advil is ibuprofen, a pain reliever and antiinflammatory medication (NSAID). Cetirizine is a second generation, non-sedating (usually) antihistamine. Most common side effects are minimal. With cetirizine, it can make you feel tired or sleepy and it could dry out your mucus membranes. For Advil, the most common side effects are limited to GI symptoms, but it can have effects on your kidneys if taken longer. Addendum: just looked up Avil and in Australia, Avil is a brand of pheniramine maleate, which is a first generation antihistamine. It can and might make your aunt sleepy. For other side effects, I would look on the package insert. Hope this information helps. READ MORE

  • Can dog hair cause allergy for my toddler?

    Yes. You can do allergy testing on a 3 year-old. The better question is SHOULD you do allergy testing. He may not be allergic now, and may never be allergic to dogs. But he could also become allergic. IF you really want to get a dog, talk to your local allergy specialist first. And of you decide to get one, please make sure you get a kid-friendly breed. That is very important. READ MORE

  • Is it true that kids born out of a C-section have poor immunity?

    There is some truth to that, but it turns out that C section babies are more prone to developing atopy in childhood and adulthood. The important factor is what skin flora colonizes the baby's GI tract: skin flora from the nurses, the caregivers and the mother OR the mother's birth canal. I recommend you read up on the role of the microbiome in C section babies. Some OB/GYNs are now using what is called a "seeding" procedure. Hope this information helps. READ MORE

  • What is the safe dose of cetrizine for kids around 5 years of age?

    Hello, 5mg should be the right dose. In a pill or syrup form READ MORE

  • Can antibiotic treat seasonal cough?

    You are correct. An antibiotic will not treat a virus. You would get better on your own. READ MORE

  • Is an allergy to apples possible?

    Yes, one can develop an allergy to apples, though a true allergy to apples is rare. It is more likely that your daughter has developed oral allergy syndrome, especially if she suffers from "hay fever " (bitch pollen allergy seems to be the culprit). READ MORE

  • What could be the cause of the itching and bumps all over my body?

    You most likely have developed chronic urticaria (hives). It would probably be best if you saw your allergist for more help. READ MORE

  • What could be the best medicine for allergic rhinitis?

    There is no "permanent cure" though allergy immunotherapy (allergy shots or allergy drops) can be very effective in essentially desensitizing you. There is no such thing as "best medicine". The choice of medicine depends on your symptoms - essentially you can take a nasal spray (there are at least five choices) and/or a pill (an antihistamine or leukotriene modifier) and/or decongestant or any combination of the above plus more. The choice of medicines is something you should discuss with your healthcare provider. I am sorry if this information seems too vague; it is the best answer I could come up with given the information your provided. READ MORE

  • I am lactose intolerant, does it mean my child will also have this condition?

    No, it does not mean that. Without knowing why type of lactose intolerance you have (there is a rare form which is hereditary), one cannot answer the question properly. It is more likely that you have the acquired form of lactose intolerance (lactase deficiency), which is more common and which is not hereditary. READ MORE

  • Are antihistamines safe for consumption during pregnancy?

    You can take cetirizine (Zyrtec) and loratadine (Claritin) and also Benadryl and Chlorpheniramine. Keep in mind that Benadryl and Chlorpheniramine are more likely to make you drowsy. READ MORE

  • is my allergy anaphylactic

    No, it is NOT anaphylactic. If it is limited to the skin only, it is not. It is considered cutaneous (pertaining or related to the skin). READ MORE

  • Do allergies change?

    Yes, they can change over time. And yes, you can develop new ones. READ MORE

  • Strange allergy, what is it?

    You have something quite common called Oral Allergy Syndrome (also known as Pollen-Food Syndrome). The most common reason why this happens is due to allergies to birch pollen, but there are other culprits. Please take a look at this link: https://www.aaaai.org/conditions-and-treatments/library/allergy-library/outdoor-allergies-and-food-allergies-can-be-relate READ MORE

  • Using an EpiPen

    It is a tiny needle hidden inside a plastic container which pops out of the container under pressure. It is meant to be used in the mid-thigh area and you don't have that many nerve endings there. You will feel a sting, but it shouldn't hurt too much. READ MORE

  • Why am I allergic to just soy milk and no other soy product?

    My suspicion is because soy "milk" is not processed (i.e. it is "raw"). Without knowing what brand of soy milk you drink and how they process the "milk", this is just a guess. READ MORE


  • 'Compassionate Doctor Recognition,' Vitals.com, 2009 and 2010   
  • 'Patient's Choice Award,' Vitals.com, 2009 and 2010   
  • 'On-Time Physician Award,' Vitals.com, 2009   


  • Allergy Skin Testing
  • Asthma
  • Rhinoscopy
  • Anaphylaxis
  • Otolaryngology
  • Specialist In Allergy And Immunology
  • General Practice
  • Pediatric Allergy & Immunology
  • Cap-rast Testing
  • Administration Of Immunomodulatory Agents
  • Patch Tests
  • Peak Flow
  • Spirometry/pulmonary Function Testing
  • Allergic Reaction
  • Allergic Rhinitis (seasonal And Perennial)
  • Allergic Contact Dermatitis (contact Eczema)
  • Angioedema
  • Asthma In Pregnancy
  • Bronchitis
  • Drug Allergy
  • Eczema
  • Immunodeficiency
  • Insect Hypersensitivity
  • Occupational Asthma
  • Otitis Media
  • Rhinitis
  • Sinusitis
  • Urticaria (hives)
  • Cough
  • Dust Allergies
  • Exanthema
  • Exercise-induced Asthma
  • Food Allergy Hypersensitivity
  • Hay Fever Seasonal Allergic Rhinitis

Professional Memberships

  • Diplomate American Board of Allergy and Immunology  2005 
  • Diplomate American Board of Internal Medicine  2003 


  • Long Island Jewish Healthcare System, the affiliate of Albert Einstein College of Medicine Internal Medicine  2013
  • North Shore Long Island Jewish Health System and Albert Einstein College of Medicine; 2003


  • Long Island Jewish Healthcare System, the affiliate of Albert Einstein College of Medicine Allergy and Immunology  2015


  • North Shore Long Island Jewish Health System and Albert Einstein College of Medicine, Allergy and Immunology

Professional Society Memberships

  • American Academy of Allergy Asthma and Immunology, American Medical Association

What do you attribute your success to?

  • Listening to Patients, Educating Patients about their Health

Hobbies / Sports

  • College Football, Soccer, Books, Magazines, Technology

Dr. Boyan Hadjiev M.D.'s Practice location

30 East 40th Street Suite 1200 -
New York, New York 10016
Get Direction
New patients: 212-679-1200, 917-909-6134
Fax: 212-679-3495, 212-679-3494

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Dr. Boyan Hadjiev M.D.'s reviews

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Patient Experience with Dr. Hadjiev


Based on 78 reviews

Dr. Boyan Hadjiev M.D. has a rating of 5 out of 5 stars based on the reviews from 78 patients. FindaTopDoc has aggregated the experiences from real patients to help give you more insights and information on how to choose the best Allergist and Immunologist in your area. These reviews do not reflect a providers level of clinical care, but are a compilation of quality indicators such as bedside manner, wait time, staff friendliness, ease of appointment, and knowledge of conditions and treatments.

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