Local. Independent. Physician-Owned Since 1949.

Katherine McCormack, MD

We are eager to provide the best care for both you and your family. Please review these clinic policies and contact our team with questions

  • Late Policy — Please arrive at least 20 minutes before your appointment. If you arrive more than 10 minutes past your appointment start time, our receptionists will help you reschedule.
  • Guest Policy — We ask that children without an appointment do not attend another family member’s appointment whenever possible. This allows us to focus on the patient and ensures that families get the most out of their visit.

About Katherine McCormack

Dr. Katie McCormack was born in San Jose, Calif. and spent most of her childhood in rural western Pennsylvania. As a result, she feels that she can happily claim two hometowns.

According to her parents, Dr. McCormack always wanted to be a doctor, a dream that persisted through childhood and adolescence. Her aspirations solidified when Dr. McCormack studied in Vietnam as an undergraduate and spent time with medically underserved children and the elderly. It was through these interactions that Dr. McCormack knew she wanted to become a physician.

Dr. McCormack’s favorite aspect of practicing medicine is her patients. “I’m fortunate to meet and interact with so many people every day who let me into their lives in the smallest way and allow me to make their lives better,” she says. “It is an amazing privilege.”

After earning her medical degree, Dr. McCormack entered a pediatrics residency at the University of Michigan. It was here that she decided to specialize as an allergist after spending time in an allergy clinic. Further travels, particularly to Ethiopia to give medical talks on asthma, also reinforced her interest in the specialty.

Dr. McCormack has always loved working with adults and children equally and enjoys developing long-term relationships with her patients. She is passionate about improving their quality of life and enjoys educating her patients about their conditions.

In her free time, Dr. McCormack enjoys hanging out with her dog, Lola, exercising at her favorite barre/spin studio, and spending time in the mountains. She aenjoys hiking, camping, and skiing (a new sport she’s picked up since moving to Colorado.) She also loves to cook, bake, and enjoy the delicious food the Front Range has to offer.

Specialty Areas

As part of the Allergy, Asthma & Immunology Department at Boulder Medical Center, Dr. Katie McCormack treats infant, youth and adult patients for everything from seasonal and food allergies to asthma and eczema. She strives to educate, inform, and empower her patients to become participants in their own wellness and care.

Dr. McCormack offers top quality care for patients in her Louisville, Colo. clinic. She regularly sees patients from throughout Boulder County along with those from nearby communities, including Broomfield, Westminster, Arvada, Golden.

Education and Certifications

Recent Katherine McCormack Posts

Xolair is the first FDA-approved medication to help reduce allergic reactions to multiple food triggers after accidental exposures. Katie McCormack, MD, allergy specialist at Boulder Medical Center – Louisville, explains this game-changing medication.

Dr. Katherine McCormack, Allergist: “The goal of this post is to help you identify symptoms of asthma and allergies and promote communication with your doctor to reduce an unnecessary urgent care or emergency room visit.”

This article is the second in a four-part food allergy series by allergist Katherine McCormack, MD. If you haven’t read…

Allergist Katie McCormack, MD: Over 90 percent of food allergies are caused by just nine foods. What are the foods and allergy symptoms?

Did you know that the vast majority of individuals who think they have a penicillin allergy actually don’t? It’s true! Penicillin is the most commonly reported drug allergy in the United States, but 9 out of 10 patients who report a penicillin allergy aren’t truly allergic.

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“Dr. McCormack is amazing! I have been struggling with asthma for more than a year with my little inhaler, and it was getting worse, and I figured that was the way it would be. After my first visit and following her protocol for the last two weeks, I feel like a new person. Dr. McCormack is so knowledgeable, explains everything in terms you can understand, and is super patient with all your questions. As a bonus, the rest of her team also rocks! Great experience and highly recommended!”

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