The 5 Best Allergists in Colorado
Board-certified allergy & asthma specialists in Denver, Centennial, Louisville.
If over-the-counter antihistamines aren't cutting it anymore, a board-certified allergist-immunologist can pinpoint exactly what you're reacting to and build a treatment plan — including immunotherapy that can reduce your sensitivity for good. Our editors researched allergists across Colorado and curated the five standouts below based on board certification, affiliations, peer recognition, and patient reputation. Before your visit, check today's pollen levels in Colorado so you can tell your doctor what was in the air when your symptoms flared.
- 1
Rohit K. Katial, MD
National Jewish Health
Denver, CO
Board-certified in Allergy & ImmunologyBoard-certified in Internal MedicineBoard-certified in Clinical Laboratory ImmunologyFellow of the AAAAIFellow of the ACAAIFellow of the American College of PhysiciansCastle Connolly Top Doctor (2024)Dr. Katial is a Professor of Medicine at National Jewish Health and the University of Colorado, where he serves as Co-Director of the Cohen Asthma Institute and Associate Vice President of Clinical Research & Industry Relationships. A nationally recognized leader in allergy and immunology, he has been selected as a Castle Connolly Top Doctor and as a Top Doctor by Denver's 5280 Magazine, and sits on the Board of Directors of the American Board of Allergy and Immunology.
Areas of focus: Asthma · Clinical immunology · Immunotherapy · Biologics for severe asthma
Visit practice website → - 2
Donald Y.M. Leung, MD, PhD
National Jewish Health
Denver, CO
Board-certified in Allergy & ImmunologyBoard-certified in PediatricsFellow of the AAAAIEdelstein Chair of Pediatric Allergy-Immunology at National Jewish HealthDr. Leung holds the Edelstein Chair of Pediatric Allergy-Immunology at National Jewish Health and is Professor of Pediatrics at the University of Colorado, where he has led the NIH/NIAID Atopic Dermatitis Research Network since 2004. With more than 600 publications and 30-plus federally funded grants, he is ranked among the world's top immunology scientists and served as Editor-in-Chief of the Journal of Allergy and Clinical Immunology from 2003 to 2015.
Areas of focus: Atopic dermatitis / eczema · Food allergy · Pediatric allergy and immunology · Clinical immunology research
Visit practice website → - 3
Flavia C. Hoyte, MD
National Jewish Health
Denver, CO
Board-certified in Allergy & ImmunologyFellow of the AAAAINational Jewish Health Department of Medicine Clinician of the Year (recipient)5280 Magazine Top DoctorDr. Hoyte is a fellowship-trained allergist and immunologist in the Division of Allergy and Clinical Immunology at National Jewish Health, affiliated with Intermountain Health Saint Joseph Hospital. She completed her fellowship at the University of Colorado/National Jewish Health and has been recognized as a Top Doctor by Denver's 5280 Magazine, and received the National Jewish Health Department of Medicine Clinician of the Year and Teacher of the Year awards.
Areas of focus: Asthma · Allergic rhinitis · Immunotherapy · Complex allergic disease
Visit practice website → - 4
Mark A. Ebadi, MD
Colorado Allergy & Asthma Centers
Centennial, CO
Board-certified in Allergy & ImmunologyCastle Connolly Top Doctor (practice recognized)Fellow of national allergy and immunology societiesDr. Ebadi joined Colorado Allergy & Asthma Centers in 2003, bringing fellowship training from National Jewish Hospital (now National Jewish Health) and chief residency experience from Northwestern. He completed his medical training at the University of Nebraska and is board certified by the American Board of Allergy and Immunology; Colorado Allergy & Asthma Centers as a whole has received the Castle Connolly Top Doc Award.
Areas of focus: Asthma · Environmental allergies · Drug allergy · Immunotherapy
Visit practice website → - 5
Shoban A. Dave, MD
Flatiron Allergy and Asthma Center
Louisville, CO
Board-certified in Allergy & Immunology5280 Magazine Top Doctor (2023, 2024, 2025)US News & World Report Top Allergist-ImmunologistClinical Instructor, University of Colorado Anschutz Medical CampusDr. Dave is a Mayo Clinic fellowship-trained allergist-immunologist and founder of Flatiron Allergy and Asthma Center, serving the Boulder, Broomfield, and Westminster corridor. He holds a Clinical Instructor appointment at the University of Colorado Anschutz Medical Campus and has been recognized as a Top Doctor in Allergy & Immunology by 5280 Magazine for three consecutive years (2023–2025).
Areas of focus: Asthma · Food allergies · Environmental allergies · Immunotherapy · Pediatric and adult allergy
Visit practice website →
How we chose the best allergists in Colorado
Our editorial team researched allergy and immunology specialists practicing across Colorado and selected these five based on:
- Board certification in Allergy & Immunology (ABAI)
- Hospital and academic affiliations with respected medical centers
- Peer recognition, including Top Doctor awards and professional society roles
- Practice reputation and years of experience treating allergy and asthma patients
- Geographic spread across Colorado's major metro areas
These listings are editorial picks, not paid placements or medical endorsements, and we have no financial relationship with any provider listed. Physician availability, insurance participation, and credentials change — always verify directly with the practice before booking. This page is for informational purposes and is not medical advice.
Frequently asked questions
How do I find a good allergist in Colorado?
Look for board certification in Allergy & Immunology, hospital or academic affiliations, and an established practice. Every allergist on this list was vetted against those criteria.
Do I need a referral?
It depends on your insurance plan, not the state. Most PPO plans let you book directly; HMO plans usually require a referral from your primary care physician.
What should I bring to my first appointment?
A list of your symptoms and when they occur, your current medications, your insurance card, and any relevant medical records. A symptom diary matched against local pollen counts is especially useful for diagnosing seasonal allergies.
Track Colorado pollen before your visit
Allergists can diagnose you faster when you know which days your symptoms flared and what was in the air. MyPollenPal tracks daily tree, grass, and weed pollen levels for cities across Colorado.