BEST RATED HOUSTON, TX ALLERGIST & IMMUNOLOGISTS

3 Best Allergists & Immunologists in Houston, TX

Expert-recommended Top 3 Allergists & Immunologists in Houston, Texas. All of our immunologists actually face a rigorous 50-Point Inspection, which includes customer reviews, history, complaints, ratings, satisfaction, trust, cost and general excellence. You deserve only the best!

Houston Allergists & Immunologists Patricia A. Leonard, MD - HOUSTON ENT & ALLERGY

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PATRICIA A. LEONARD, MD

HOUSTON ENT & ALLERGY
780 West Sam Houston Parkway North, Suite 400,
Houston, TX 77024 Directions

Since 1996

Specialty:

✓ Environmental Allergies ✓ Skin Allergies ✓ Facial Plastic Surgery ✓ Asthma ✓ Food Allergies ✓ Insect Allergies ✓ Eczema ✓ Laryngitis ✓ Swallowing Disorders ✓ Vocal Cord Paralysis ✓ Laryngeal Reflux ✓ Ear Infections ✓ Ear Wax ✓ Balance Disorders ✓ Tinnitus ✓ Perforated Eardrum ✓ Otosclerosis ✓ Cholesteatoma ✓ Ear Aches ✓ Vertigo ✓ Deviated Nasal Septum ✓ Sinusitis ✓ Nasal Airway Obstruction ✓ Nasal Fracture ✓ Chronic Nose and Throat Inflammation Due to Allergies ✓ Acute Sinusitis ✓ Drug ✓ Insect and Food Allergies

"Dr. Patricia A. Leonard obtained her medical degree from the National University of Ireland Galway School of Medicine in 1996 and completed her residency at the University Of Texas Health System. She holds certifications in Allergy & Immunology and Internal Medicine. She is board-certified in Allergy and Immunology. Her expertise lies in the diagnosis and treatment of various allergic conditions, including Asthma, Nasal Allergies, and Allergic Skin Disorders. She assesses insect, drug, and food allergies. Dr. Patricia A. Leonard has authored numerous research articles on the subject of allergy and immunology. She is associated with Allergy, Sinus, Asthma Professionals, PLLC, as well as Southwest Asthma and Allergy Associates.

2026 Update: Dr. Patricia A. Leonard has been providing allergy care in the Houston community for 10 years. She is a member of local, state, and national allergy organizations and a Fellow of the American College of Allergy and Immunology."

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Houston Allergists & Immunologists Christopher Collaco, MD, PH.D - ADVANCED ALLERGY AND ASTHMA CENTER

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CHRISTOPHER COLLACO, MD, PH.D

ADVANCED ALLERGY AND ASTHMA CENTER
3914 Gramercy, Suite A,
Houston, TX 77025 Directions

Since 1999

Specialty:

✓ Allergic Rhinitis ✓ Acute Sinusitis ✓ Chronic Nose and Throat Inflammation Due to Allergies ✓ Asthma ✓ Contact Dermatitis ✓ Atopic Dermatitis ✓ Allergic Conjunctivitis ✓ Honey Bee ✓ Wasp Hornet Allergy ✓ Fire Ant Allergy ✓ Food Allergy ✓ Drug Allergy ✓ Urticaria (Hives) ✓ Immunodeficiency and Recurrent Infections ✓ Spirometry ✓ Skin Prick Test ✓ Intradermal Skin Testing ✓ Patch Test ✓ Nasal Secretions Staining ✓ Allergen Immunotherapy (Allergy Shots) ✓ Chronic Sinusitis

"Dr. Christopher Collaco completed his medical degree from the University of Texas Medical Branch in Galveston. He did his Residency in Internal Medicine at the University of Texas Health Science Center in Houston. Dr. Christopher Collaco also completed his Allergy and Immunology Fellowship training, specializing in Adult and Pediatric Asthma, Allergy, and Immunology. He has membership in many associations, such as a member of the Texas Asthma, Allergy and Immunology Society, the Greater Houston Asthma, Allergy and Immunology Society, and the South Texas Independent Allergists. He treats all the allergic and immune disorders. Dr. Christopher Collaco is a well-trained immunologist who served as a staff member at MD Anderson Cancer Center in the Department of General Internal Medicine. He is the director of the Advanced Allergy and Asthma Center.

2026 Update: At Advanced Allergy and Asthma Center, your treatment is guided by a multi-pronged approach that begins with a detailed medical history, followed by the identification of allergens responsible for your symptoms."

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Houston Allergists & Immunologists Doanh Nguyen, MD, FAAAAI - TEXAS ALLERGY GROUP

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DOANH NGUYEN, MD, FAAAAI

TEXAS ALLERGY GROUP
17203 Red Oak Drive, Suite 101,
Houston, TX 77090 Directions

Since 2007

Specialty:

✓ Allergic Inflammation ✓ Allergic Rhinitis and Conjunctivitis ✓ Asthma ✓ Eczema ✓ Acute and Chronic Urticaria ✓ Angioedema ✓ Food Allergy ✓ Eosinophilic Esophagitis ✓ Occupational Allergy ✓ Primary Immunodeficiency ✓ Immune Dysregulation ✓ Chronic Sinusitis ✓ Chronic Cough ✓ Allergy Test (Skin Test) ✓ Allergy Shot ✓ Allergy Drop & Allergy Tablet ✓ Patch Test ✓ Lung Function Test ✓ FeNO Measurement ✓ Oral Food and Oral Drug Challenge ✓ Food Desensitization ✓ Penicillin Allergy Testing ✓ Local Anesthetic Allergy Testing ✓ Drug Desensitization ✓ Aspirin Desensitization ✓ Insect Allergy Desensitization ✓ Sinus CT Imaging ✓ Rhinoscopy ✓ Biologics Monoclonal Antibodies

"Dr. Doanh Nguyen finished his medical degree from the University of Texas Medical School in Houston in 2007. He completed his internship and residency in internal medicine at University Hospitals, Case Western Reserve University in Cleveland, Ohio, followed by fellowship training in the Division of Allergy, Immunology, and Rheumatology (Pediatrics) at All Children’s Hospital/Johns Hopkins Medicine, University of South Florida in St. Petersburg, Florida. Dr. Doanh Nguyen takes care of both children and adults. He is particularly passionate about treating patients with severe eczema, asthma, hives, and primary immunodeficiency, helping to improve their quality of life. He also published many research works. Dr. Doanh Nguyen is practicing in the Texas Allergy Group.

2026 Update: Dr. Doanh Nguyen's current research focuses on systemic allergic inflammation, inflammatory burden, biomarker stratification, and mechanisms of tolerance disruption. He develops biomarker-guided approaches to detect and reduce systemic inflammation before organ complications arise. He offers comprehensive evaluation and personalized treatment for mast cell–related symptoms, from multisystem reactivity to chronic inflammation."

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Dr. Collaco is an exceptional allergy specialist who truly goes above and beyond for his patients. He is incredibly informative, taking the time to thoroughly educate me on my condition and ensuring that I fully understood my treatment options. His patience and willingness to answer all of my questions made me feel valued and cared for. Dr. Collaco is also compassionate, providing reassurance and support throughout the entire process, making what could have been an overwhelming experience much more manageable. His expertise is evident in his detailed explanations and personalized approach to treatment. I left my appointment feeling confident in his knowledge and the care plan he provided. I highly recommend Dr. Collaco to anyone in need of a knowledgeable and caring allergy specialist!.

Our family has been going to Dr. Collaco for years. He and his entire staff are great and always treat us like family. Dr. Collaco takes time to explain in great detail any treatment plan and answer any questions we may have. Highly recommend the Advanced Allergy and Asthma Center.

Dr. Collaco is a great allergist. I suffered from allergies for several years and when I found Dr.Collaco I was miserable. He was great! Took great care of me and I started taking allergies shots. It was a life changing. Very happy with his clinic.

Initially, I was very nervous, but the environment was calming and relaxing. The doctor and staff were incredibly cooperative and supportive, which made the whole experience much easier. I truly appreciate their professionalism and kindness.

This allergist has been me and my brother’s doctor for a couple years now. We come routinely for allergy shots and have been both been feeling so much better. The trick is staying on top of your shots and then you start to really feel the difference. The doctor is patient and understanding when we have questions about our treatment. We would highly recommend. Two thumbs up!.

Great service, great Doctors and staffs..highly recommended.

Acknowledgments: 9

Complete Info: 9

Contact Info: 10

Current Evaluation: 10

Exact Services: 10

Experience: 10

Legitimate Ratings: 10

Location Proximity: 10

Online Appointment: 10

Review Analysis: 10

Reviews Accuracy of : 10

Video: 10

Our Inspection includes everything from checking reviews, ratings, reputation, history, complaints, satisfaction, trust and cost to the general excellence. If you are looking for full list of our 50-Point Inspection, the following list will give you a clear picture. Few items may not be applicable to all businesses.

Business Hours: 8

Business Images: 9

License: 10

Experience: 9

Reviews Study: 9

3 Best Allergists & Immunologists in Houston, TX

Expert-recommended Top 3 Allergists & Immunologists in Houston, Texas. All of our immunologists actually face a rigorous 50-Point Inspection, which includes customer reviews, history, complaints, ratings, satisfaction, trust, cost and general excellence. You deserve only the best!

PATRICIA A. LEONARD, MD

Since 1996

Specialty:

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CHRISTOPHER COLLACO, MD, PH.D

Since 1999

Specialty:

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DOANH NGUYEN, MD, FAAAAI

Since 2007

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3 Best Allergists & Immunologists in Houston, TX

Expert-recommended Top 3 Allergists & Immunologists in Houston, Texas. All of our immunologists actually face a rigorous 50-Point Inspection, which includes customer reviews, history, complaints, ratings, satisfaction, trust, cost and general excellence. You deserve only the best!

PATRICIA A. LEONARD, MD

Since 1996

Specialty:

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CHRISTOPHER COLLACO, MD, PH.D

Since 1999

Specialty:

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DOANH NGUYEN, MD, FAAAAI

Since 2007

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PATRICIA A. LEONARD, MD REVIEWS

CHRISTOPHER COLLACO, MD, PH.D REVIEWS

DOANH NGUYEN, MD, FAAAAI REVIEWS

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