The 5 Best Allergists in Denver, CO
Board-certified allergy & asthma specialists practicing in Denver, Centennial, and Louisville.
If over-the-counter antihistamines stopped working, or your symptoms run for months instead of weeks, a board-certified allergist-immunologist can test what you actually react to and treat the cause. That includes immunotherapy, which lowers your sensitivity over three to five years. Our editors picked the 5 specialists below from the wider Colorado list based on board certification, hospital and academic affiliations, and peer recognition.
Allergists in Denver at a Glance
- Specialists listed:
- 5, all board-certified in Allergy & Immunology
- Areas covered:
- Denver, Centennial, and Louisville
- Practices:
- National Jewish Health, Colorado Allergy & Asthma Centers, Flatiron Allergy and Asthma Center
- Local pollen season:
- Elm and juniper start in March along the Front Range, grass peaks in June, and ragweed and Russian thistle run from August to the first freeze in early October. Dry, windy days keep Denver pollen airborne longer than it would stay up in a humid city.
Compare Denver Allergists
| Allergist | Practice | Location | Known for |
|---|---|---|---|
| Rohit K. Katial, MD | National Jewish Health | Denver, CO | Asthma, Clinical immunology, Immunotherapy |
| Donald Y.M. Leung, MD, PhD | National Jewish Health | Denver, CO | Atopic dermatitis / eczema, Food allergy, Pediatric allergy and immunology |
| Flavia C. Hoyte, MD | National Jewish Health | Denver, CO | Asthma, Allergic rhinitis, Immunotherapy |
| Mark A. Ebadi, MD | Colorado Allergy & Asthma Centers | Centennial, CO | Asthma, Environmental allergies, Drug allergy |
| Shoban A. Dave, MD | Flatiron Allergy and Asthma Center | Louisville, CO | Asthma, Food allergies, Environmental allergies |
- 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 →
Allergy Season in Denver
Elm and juniper start in March along the Front Range, grass peaks in June, and ragweed and Russian thistle run from August to the first freeze in early October. Dry, windy days keep Denver pollen airborne longer than it would stay up in a humid city.
Bring dates to your appointment. An allergist can narrow the list of suspects much faster when you can say “this started the second week of April” and match it against what was actually in the air.
- Today's pollen count in Denver for tree, grass, and weed levels plus a 5-day forecast
- Denver air quality for ozone and particle pollution, which make pollen symptoms worse
How We Picked These Denver Allergists
Our editorial team reviewed allergy and immunology specialists practicing across the Front Range and selected these 5 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 treating allergy and asthma patients
- Coverage across the metro, so the list is not all one hospital system
These listings are editorial picks, not paid placements or medical endorsements, and we have no financial relationship with any provider listed. Availability, insurance participation, and credentials change. Verify directly with the practice before booking. This page is for informational purposes and is not medical advice.
Frequently Asked Questions
Who are the best allergists in Denver?
Our editors picked 5 board-certified allergist-immunologists practicing in the Front Range: Rohit K. Katial, MD at National Jewish Health in Denver; Donald Y.M. Leung, MD, PhD at National Jewish Health in Denver; Flavia C. Hoyte, MD at National Jewish Health in Denver; Mark A. Ebadi, MD at Colorado Allergy & Asthma Centers in Centennial; Shoban A. Dave, MD at Flatiron Allergy and Asthma Center in Louisville. All are board-certified in Allergy & Immunology.
When is allergy season in Denver?
Elm and juniper start in March along the Front Range, grass peaks in June, and ragweed and Russian thistle run from August to the first freeze in early October. Dry, windy days keep Denver pollen airborne longer than it would stay up in a humid city.
See today's pollen count in Denver →Do I need a referral to see an allergist in Denver?
That depends on your insurance plan, not your city. Most PPO plans let you book straight with an allergist. HMO plans usually want a referral from your primary care doctor first. Call the practice or your insurer before you book.
How much does an allergist visit cost in Denver?
A first visit with a specialist typically runs $150 to $300 without insurance, and skin testing for a panel of environmental allergens usually adds $200 to $1,000 depending on how many allergens are tested. With insurance you pay your specialist copay, though testing is often billed separately. Ask the office for a cost estimate and their billing codes when you book.
What should I bring to my first allergist appointment?
Bring a list of your symptoms and the dates they flared, every medication you take including over-the-counter ones, your insurance card, and any past test results. Stop antihistamines 5 to 7 days before skin testing, since they can blunt the results. Confirm the exact timing with the office.
Check Denver pollen levels to match your flare dates →Are these Denver allergists accepting new patients?
That changes month to month, so call the practice to check. These are editorial picks, not paid placements, and we have no financial relationship with any provider listed. Verify current credentials, availability, and insurance participation directly with the office before you book.
Allergists in Nearby Cities
Before You Call
Start a symptom log this week. Note the day, what you felt, and what the pollen count was. Two or three weeks of that turns a vague “my allergies are bad” into something an allergist can work from.
- Check Denver pollen levels today
- See all Colorado allergists
- Read our allergy guides on symptoms, seasons, and relief